Relevant bibliographies by topics / Electric field induced phase transition

Academic literature on the topic 'Electric field induced phase transition'

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Published: 7 July 2024

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Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Journal articles on the topic "Electric field induced phase transition":

1

Lelidis, I., and G. Durand. "Electric-field-induced isotropic-nematic phase transition." Physical Review E 48, no. 5 (November 1, 1993): 3822–24. http://dx.doi.org/10.1103/physreve.48.3822.

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Zhang, Yu, Weiping Gong, Zhen Li, Jianting Li, Changyu Li, Jun Chen, Yaodong Yang, Yang Bai, and Wei-Feng Rao. "Two Consecutive Negative Electrocaloric Peaks in <001>-Oriented PMN-30PT Single Crystals." Crystals 14, no. 5 (May 12, 2024): 458. http://dx.doi.org/10.3390/cryst14050458.

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The versatile electrocaloric (EC) behaviors of the (1-x)Pb(Mg1/3Nb2/3)O3-xPT (PMN-100xPT) single crystal are closely related to the multiple phase transitions under the multiple fields of electric field and temperature. In this work, the EC effect of <001>-oriented PMN-30PT single crystals with chemical composition at morphotropic phase boundary has been studied during the phase transformation process from the ferroelectric rhombohedral (R) phase to the tetragonal (T) phase. Two consecutive negative EC peaks have been achieved for the first time. Based on the projection of the EC effect in the electric field-temperature phase diagram, the relationship between the EC behaviors and the phase transitions is further established. It was found that the monoclinic (M) phase actually existed during the transformation from the R phase to the T phase, and the related R-M phase transition and M-T phase transition could both induce negative EC peaks. Under the electric field of E = 10 kV/cm, the first negative EC peaks induced by the R-M phase transition is at 57 °C with ΔTmax = −0.11 K. And the M-T phase transition can produce a higher negative EC peak, and its value can reach −0.22 K at 68 °C. Based on thermodynamic calculations, the relationship between the entropy change in different phase transitions and the EC behaviors has been further elucidated. The negative EC effect originates from the structural entropy increase in the electric field-induced phase transition process. This work not only advances the research on the electrical properties of relaxor ferroelectric single crystals but also provides a new insight into high-performance ferroelectric materials design.
3

Hinterstein, Manuel, Michael Knapp, Markus Hölzel, Wook Jo, Antonio Cervellino, Helmut Ehrenberg, and Hartmut Fuess. "Field-induced phase transition in Bi1/2Na1/2TiO3-based lead-free piezoelectric ceramics." Journal of Applied Crystallography 43, no. 6 (October 13, 2010): 1314–21. http://dx.doi.org/10.1107/s0021889810038264.

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The origin of the electric field-induced strain in the polycrystalline ceramic 0.92Bi1/2Na1/2TiO3–0.06BaTiO3–0.02K1/2Na1/2NbO3was investigated usingin situhigh-resolution X-ray and neutron diffraction techniques. The initially existing tetragonal phase with pseudocubic lattice undergoes a reversible phase transition to a significantly distorted rhombohedral phase under electric field, accompanied by a change in the oxygen octahedral tilting froma0a0c+toa−a−a−and in the tilting angle. The polarization values for the tetragonal and rhombohedral phases were calculated based on the structural information from Rietveld refinements. The large recoverable electric field-induced strain is a consequence of a reversible electric field-induced phase transition from an almost nonpolar tetragonal phase to a ferroelectrically active rhombohedral phase.
4

Hirotsu, Shunsuke. "Electric-Field-Induced Phase Transition in Polymer Gels." Japanese Journal of Applied Physics 24, S2 (January 1, 1985): 396. http://dx.doi.org/10.7567/jjaps.24s2.396.

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Tao, R. "Electric-field-induced phase transition in electrorheological fluids." Physical Review E 47, no. 1 (January 1, 1993): 423–26. http://dx.doi.org/10.1103/physreve.47.423.

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Камзина, Л. С. "Индуцированный фазовый переход в монокристаллических твердых растворах PbMg-=SUB=-1/3-=/SUB=-Nb-=SUB=-2/3-=/SUB=-O-=SUB=-3-=/SUB=--29PbTiO-=SUB=-3-=/SUB=- и PbZn-=SUB=-1/3-=/SUB=-Nb-=SUB=-2/3-=/SUB=-O-=SUB=-3-=/SUB=--9PbTiO-=SUB=-3-=/SUB=-: сходство и различие." Физика твердого тела 63, no. 11 (2021): 1880. http://dx.doi.org/10.21883/ftt.2021.11.51591.152.

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The kinetics of the induced phase transition in single-crystal relaxor solid solutions PbMg1 / 3Nb2 / 3O3-29PbTiO3 and PbZn1 / 3Nb2 / 3O3-9PbTiO3 is studied when an electric field is applied along the [001] direction. At temperatures below the temperature of the morphotropic phase transition, the changes in the dielectric constant and optical transmission in electric fields are studied. It is shown that the decrease in optical transmission with time is associated only with a change in the sizes of nanoregions during the phase transition. It was found that the induced phase transition proceeds differently in these crystals. In PMN-29PT crystals, the formation of ferroelectric phases and the rapid establishment of macroscopic polarization are preceded by a certain delay time, while in PZN-9PT crystals, the ferroelectric phase is induced immediately after the application of the field without a delay time. The results obtained are explained by the different structures of the low-temperature phases in these compounds. Key words: ferroelectricity, relaxors, induced phase transition.
7

Kamzina L.S. "Induced phase transition in monocrystalline solids solutions PbMg-=SUB=-1/3-=/SUB=-Nb-=SUB=-2/3-=/SUB=-O-=SUB=-3-=/SUB=--29PbTiO-=SUB=-3-=/SUB=- and PbZn-=SUB=-1/3-=/SUB=-Nb-=SUB=-2/3-=/SUB=-O-=SUB=-3-=/SUB=--9PbTiO-=SUB=-3-=/SUB=-: similarity and difference." Physics of the Solid State 63, no. 13 (2022): 1743. http://dx.doi.org/10.21883/pss.2022.13.52315.152.

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The kinetics of the induced phase transition in single-crystal relaxor solid solutions PbMg1/3Nb2/3O3-29PbTiO3 and PbZn1/3Nb2/3O3-9PbTiO3 is studied when an electric field is applied along the [001] direction. At temperatures below the temperature of the morphotropic phase transition, the changes in the dielectric constant and optical transmission in electric fields are studied. It is shown that the decrease in optical transmission with time is associated only with a change in the sizes of nanoregions during the phase transition. It was found that the induced phase transition proceeds differently in these crystals. In PMN-29PT crystals, the formation of ferroelectric phases and the rapid establishment of macroscopic polarization are preceded by a certain delay time, while in PZN-9PT crystals, the ferroelectric phase is induced immediately after the application of the field without a delay time. The results obtained are explained by the different structures of the low-temperature phases in these compounds. Keywords: ferroelectricity, relaxors, induced phase transition.
8

Li, Zhen Rong, Jun Jie Qian, Guo Qiang Zhang, Zeng Zhe Xi, Zhuo Xu, and Xi Yao. "Dielectric Properties and Phase Transition of [110]-Oriented 0.68PMN-0.32PT Single Crystals Induced by Temperature and DC Electric Field." Key Engineering Materials 336-338 (April 2007): 42–45. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.42.

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The dielectric response of [110]-oriented 0.68PMN-0.32PT single crystal under dc electric field has been investigated. The characteristics of phase transition under temperature and dc electric field are provided. When electric field is above 2.3kV/cm, abnormal phase transition is induced by temperature and electric field, which corresponds to the phase transition from rhombohedral to orthorhombic ferroelectric phase. With increasing dc electric field, the stable temperature region of orthorhombic phase is expanded. The electric field-temperature (E-T) phase diagram of [110]-oriented 0.68PMN-0.32PT single crystals is presented. The polarization rotation in [110]-oriented single crystal is discussed.
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Moriwake, Hiroki, Ayako Konishi, Takafumi Ogawa, Craig A. J. Fisher, Akihide Kuwabara, and Desheng Fu. "The electric field induced ferroelectric phase transition of AgNbO3." Journal of Applied Physics 119, no. 6 (February 10, 2016): 064102. http://dx.doi.org/10.1063/1.4941319.

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Mukherjee, Prabir K., and Muklesur Rahman. "Electric-field induced isotropic to smectic-C phase transition." Journal of Molecular Liquids 196 (August 2014): 204–7. http://dx.doi.org/10.1016/j.molliq.2014.03.034.

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Journal articles Dissertations / Theses

Dissertations / Theses on the topic "Electric field induced phase transition":

1

Koussir, Houda. "Multiscale study of the electric field induced transition in the Mott phase of GaMo4S8 crystals and TaSe2 monolayers." Electronic Thesis or Diss., Université de Lille (2022-....), 2024. http://www.theses.fr/2024ULILN004.

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Dans le domaine de la physique de la matière condensée, les isolants de Mott sont essentiels pour explorer des phénomènes électroniques complexes, ayant des implications significatives pour la supraconductivité à haute température et les liquides de spin quantiques. Cette thèse porte sur deux types d'isolants de Mott qui se distinguent l'un de l'autre par leur dimensionalité : des cristaux de GaMo4S8 et des monocouches de 1T-TaSe2.Après avoir introduit leurs propriétés dans le premier chapitre, le second chapitre traite des techniques utilisées pour caractériser ces matériaux à l'échelle locale, d'une part la microscopie et spectroscopie à effet tunnel pour mener une étude structurale et électronique et d'autre part la microscopie à effet tunnel à pointes multiples pour effectuer des mesures de transport.Cette dernière technique a notamment servi à analyser le transport dans GaMo4S8. Nous nous sommes alors intéressés à la réponse du matériau aux champs électriques externes, examinant le champ électrique seuil en fonction de la géométrie des électrodes et explorant l'évolution temporelle des temps de commutation en relation avec les distances inter-électrodes. L'obtention de transitions volatiles ouvre la voie à des applications telles que l'opération d'un microneurone à température ambiante.Pour mieux contrôler les propriétés de transition de phase des isolants de Mott, il est intéressant de considérer des systèmes bidimensionnels dans lesquels le passage du courant est confiné dans le plan du cristal. Aussi, le dernier chapitre se rapporte à la phase 1T du TaSe2, épitaxiée sur des substrats semi-conducteurs de phosphure de gallium (GaP). Comme le révèle l'étude réalisée par microscopie à effet tunnel à basse température, les monocouches de 1T-TaSe2 ne présentent pas seulement la modulation de la densité de charge (étoile de David) caractéristique de la phase onde de densité de charge, mais aussi un motif de Moiré original dû à l'interaction de la monocouche avec le substrat de GaP. Dans cette phase, caractérisée par spectroscopie tunnel, une bande interdite a été mise en évidence, signature de l'état isolant de Mott à basse température. L'état de Mott est corroboré par des mesures de transport dépendant de la température, qui indiquent la persistance de la phase isolante jusqu'à 400 kelvins. De plus, des mesures spectroscopiques à distance pointe-surface variable ont montré l'existence de transitions isolant-métal à basse température. L'observation de telles transitions permet d'envisager l'utilisation de cette hétérostructure à grande échelle comme candidat potentiel en tant que matériau neuromorphique
In the realm of condensed matter physics, Mott insulators are essential for exploring complex electronic phenomena, with significant implications for high-temperature superconductivity and quantum spin liquids. This thesis investigates two types of such materials, distinguished by their dimensionality : GaMo4S8 crystals and monolayer 1T-TaSe2.After presenting their properties in the first chapter, the second chapter addresses the local-scale characterization techniques used to characterize both materials, namely scanning tunneling microscopy and spectroscopy for structural and electronic studies, and multi-tip scanning tunneling microscopy for transport measurements. The latter technique was particularly employed to analyze transport in GaMo4S8. The study then delved into the material response to external electric fields, examining the threshold electric field in relation to the electrode geometry and exploring the temporal evolution of switching times in connection with inter-electrode distances. The achievement of volatile transitions opens prospects for applications such as the operation of a microneuron at room temperature.To enhance the control over phase transition properties of Mott insulators, it is beneficial to consider two-dimensional systems where the current flow is restricted within the crystal plane. The final chapter focuses on the 1T phase of TaSe2, epitaxially grown on gallium phosphide (GaP) semiconductor substrates. Low-temperature scanning tunneling microscopy studies reveal that 1T-TaSe2 monolayers exhibit not only the characteristic charge density modulation (Star of David) of the charge density wave phase but also a unique Moiré pattern due to the monolayer interaction with the GaP substrate. Scanning tunneling spectroscopy has identified a bandgap, hallmark of the Mott insulating state. This state is further substantiated by temperature-dependent transport measurements that show the persistence of the insulating phase up to 400 kelvins. Notably, spectroscopic measurements with varying tip-to-surface distances have unveiled insulator to metal transitions at low temperatures. The observation of such transitions suggests that this large-scale heterostructure could be a material of choice for neuromorphic applications
2

Peräntie, J. (Jani). "Electric-field-induced dielectric and caloric effects in relaxor ferroelectrics." Doctoral thesis, Oulun yliopisto, 2014. http://urn.fi/urn:isbn:9789526204406.

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Abstract In this thesis, dielectric and thermal behaviours due to the application of an electric field were studied in relaxor ferroelectric (1−x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT) and (1−x)Pb(Zn1/3Nb2/3)O3-xPbTiO3 (PZN-PT) systems of great technological importance. Special attention was given to the behaviour of the electric-field-induced phase transitions and electrocaloric effect, which are closely related to the existing and potential applications. Reactive sintering or columbite methods were used to fabricate polycrystalline PMN-PT ceramics with various compositions (x=0−0.3). In addition, commercial PMN-PT single crystals with composition close to the morphotropic phase boundary region were used. A studied PZN-PT crystal composition was grown by solution gradient cooling technique. Materials were mainly studied by means of dielectric and direct temperature measurements. The electrocaloric effect observed in a ceramic PMN-PT system was found to show distinct maximum values close to the thermal depolarization temperatures with low electric fields. The temperature range and magnitude of the electrocaloric effect was significantly expanded to high temperatures with increasing electric fields due to the contribution of polar nanoregions. The maximum electrocaloric temperature change was in the range of 0.77−1.55 °C under an electric field of 50 kV/cm. In addition, temperature change measurements on depoled PMN-0.13PT ceramics demonstrated that the electrocaloric effect is accompanied with an irreversible part below its depolarization temperature due to hysteresis loss and a possible phase transition type response related to the evolution of the macroscopic polarization. An electric field application to the <001> and <011> directions in PMN-PT crystals was found to cause distinct anomalies in the dielectric and temperature change responses. These anomalies were attributed to the complex polarization rotation routes and different phase stability regions in the electric-field-temperature phase diagrams of PMN-PT. Furthermore, measurements on PMN-PT crystals provided the first direct indications of a temporarily reversed electrocaloric effect with an increasing electric field. In addition, the measured electrocaloric trends in PZN-PT crystal were reproduced by a simple lattice model and mean-field approximation around the transition temperature. This demonstrated that the electrocaloric effect is driven mainly by the dipolar entropy lowering
Tiivistelmä Tässä työssä tutkittiin dielektristen ominaisuuksien ja lämpötilan käyttäytymistä teknologisesti merkittävissä (1−x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT) ja (1−x)Pb(Zn1/3Nb2/3)O3-xPbTiO3 (PZN-PT) ferrosähköisissä relaksorimateriaaleissa sähkökentän vaikutuksen alaisena. Tutkimuksen erityishuomion kohteena olivat sähköisesti indusoidut faasimuutokset sekä sähkökalorinen ilmiö, jotka liittyvät läheisesti nykyisiin sekä tulevaisuuden sovellutuksiin. Monikiteisiä PMN-PT keraamikoostumuksia (x=0−0,3) valmistettiin sekä reaktiivisella sintrauksella että kolumbiittimenetelmällä. Lisäksi tutkimuksessa käytettiin kaupallisia PMN-PT erilliskiteitä, joiden koostumus on lähellä morfotrooppista faasirajaa. Työssä käytetty PZN-PT erilliskide kasvatettiin jäähdyttämällä korkean lämpötilan liuoksesta. Materiaaleja tutkittiin pääosin lämpötilan ja dielektristen ominaisuuksien mittauksilla. Kun PMN-PT keraamisysteemiin kohdistettiin alhainen sähkökenttä, sähkökalorisen ilmiön selkeä maksimiarvo havaittiin lähellä materiaalin termistä depolarisaatiolämpötilaa. Suuremmilla sähkökentän arvoilla sähkökalorinen ilmiö voimistui ja sen lämpötila-alue laajeni korkeampiin lämpötiloihin polaaristen nanoalueiden kytkeytymisen vuoksi. Sähkökalorisen lämpötilamuutoksen maksimi vaihteli välillä 0,77−1,55 °C sähkökentän arvolla 50 kV/cm. Lisäksi lämpötilamittaukset depoolatulle PMN-0,13PT koostumukselle osoittivat, että sähkökalorisen ilmiön ohella materiaalissa esiintyy makroskooppisen polarisaation muodostumiseen liittyvä palautumaton lämpöenergia depolarisaatiolämpötilaa pienemmissä lämpötiloissa hystereesihäviön ja mahdollisen faasimuutoksen vaikutuksesta. PMN-PT erilliskiteiden dielektrisyys- ja lämpötilavasteessa havaittiin selkeitä muutoksia sähkökentän vaikuttaessa <001> ja <011> kidesuuntiin. Nämä muutokset ovat selitettävissä PMN-PT:n polarisaation kompleksisten rotaatiosuuntien ja erityyppisten sähkökenttä-lämpötila -faasidiagrammien stabiilisuusalueiden avulla. PMN-PT kiteiden mittauksissa havaittiin myös ensimmäinen suora osoitus väliaikaisesti käänteisestä sähkökalorisesta ilmiöstä sähkökentän kasvaessa. Lisäksi mitatut PZN-PT erilliskiteen sähkökaloriset ominaisuudet transitiolämpötilan läheisyydessä pystyttiin pääpiirteittäin mallintamaan käyttämällä yksinkertaista hilamallia ja keskimääräisen kentän approksimaatiota. Mallinnuksen mukaan sähkökalorinen ilmiö aiheutuu pääasiassa sähköisesti indusoidusta dipolientropian alenemisesta
3

Cheng, Long. "Relaxor ferroelectrics for neuromorphic computing." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST073.

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Pour surmonter les défis posés par les architectures traditionnelles de von Neumann, l'informatique neuromorphique s'inspire des sciences du cerveau pour créer du matérielécoénergétique adaptable à des tâches complexes. Les memristors, bien que novateurs,rencontrent des problèmes tels que la chaleur de Joule entravant le calcul neuronal à trèsbasse puissance.Pour remédier à cela, nous proposons un mécanisme de memcapacitor -la transition de phase induite par champ électrique. Les memcapacitors, qui expriment les signaux en tension, offrent une consommation d'énergie inférieure aux memristors (basés surle courant). Notre étude sur les matériaux ferroélectriques relaxeur (PMN-28PT, PZN-4.5PT) et le ferroélectrique conventionnel BTO (001) démontre la nature universelle des transitions de phase induites par champ électrique. Des impulsions personnalisées permettent la reproduction de la potentialisation à long terme (LTP), de la dépression à long terme (LTD) et de la plasticité dépendante du temps d'impulsion (STDP).De plus, les ferroélectriques relaxeur présentent un effet dendritique absent dans les contreparties conventionnelles. La mise en œuvre de dendrites PZN-4.5PT dans les réseaux neuronaux améliore la précision (83.44 %), surpassant les réseaux de memristors avec dendrites linéaires (81.84 %) et surpassant de manière significative les réseaux sans dendrites (80.1 %).En fin de compte, nous mettons en œuvre avec succès un memcapacitor relaxeur enutilisant un film mince PMN. Cette structure métal/ferroélectrique/métal/isolant atteint desétats capacitifs de 3 bits par le biais de transitions de phase induites par champ. 8 états memcapacitifs robustes présentent une maintenance cohérente sur plus de 100 secondes et une endurance exceptionnelle dépassant 5×10^5 cycles. Des impulsions sur mesure émulent efficacement LTP, LTD, et permettent l'exploration des fonctionnalités synaptiques dépendantes de la température
To overcome challenges posed by traditional von Neumann architectures, neuromorphic computing draws inspiration from brain science to create energy-efficient hardware adaptable to complex tasks. Memristors, though novel, face issues like Joule heat hindering ultra-low-power neural computing.To address this, we propose a memcapacitor mechanism - the electric-field-induced phase transition. Memcapacitors, expressing signals as voltage, offer lower power consumption than memristors (current-based). Our study on relaxor ferroelectric materials (PMN-28PT, PZN-4.5PT) and conventional ferroelectric BTO (001) demonstrates the universal nature ofelectric-field-induced phase transitions. Customized pulses enable the replication of long-term potentiation (LTP), depression (LTD), and spike-timing-dependent plasticity (STDP).Additionally, relaxor ferroelectrics exhibit a dendrite effect absent in conventional counterparts. Implementing PZN-4.5PT dendrites in neural networks improves accuracy (83.44%), surpassing memristor networks with linear dendrites (81.84%) and significantly outperforming networks without dendrites (80.1%).Ultimately, we successfully implement a relaxor memcapacitor using a PMN thin film.This metal/ferroelectric/metal/insulator structure achieves 3-bit capacitance states through field-induced phase transitions. 8 robust memcapacitive states exhibit consistent maintenance over 100 seconds and exceptional endurance exceeding 5×10^5cycles. Tailored pulses effectively emulate LTP and LTD, and enable the exploration of temperature-dependent synaptic functionalities
4

Johnson, Louise. "Electric field-induced transitions and interlayer interactions in intermediate smectic liquid crystal phases." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/electric-fieldinduced-transitions-and-interlayer-interactions-in-intermediate-smectic-liquid-crystal-phases(64a81e3e-d148-48b4-8e94-4abd44117655).html.

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This thesis presents an investigation into the effects of an external electric field on the three- and four-layer intermediate smectic phases. Experiments were performed using electro-optic techniques; thresholds between phases were measured by studying changes in the effective optical tilt. A quantitative measure of the interlayer interaction constant was obtained from the analysis of field-temperature phase diagrams in several materials, which exhibited the intermediate smectic phases in various degrees of stability. Excellent agreement with theory was observed in the field-temperature phase diagrams of these materials. The effect of adding a chiral dopant to liquid crystal compounds was studied and it was found that the interlayer interaction strength is significantly lower in mixtures with a chiral dopant. These measurements provided quantitative information on the importance of the interlayer interaction, which is only indicated qualitatively by other measurements. Deviations from theory were reported in mixtures with increasing concentrations of chiral dopant, in particular in the nature of the transition from the four-layer phase to the three-layer phase. Interesting behaviour in the thresholds between phases was observed in several liquid crystal mixtures in temperature regions close to the triple point on the field- temperature phase diagrams. Measurements of the thresholds between the intermediate phases revealed an unexpected threshold. Further evidence of this unexpected threshold was presented in the form of results of the temperature dependence of effective optical tilt of the various phases; electric field dependence of the response time; and the transient current that flows upon the reversal of an electric field. These measurements revealed that the unexpected threshold was to a field-induced ferrielectric phase with a larger effective tilt than the three-layer phases. Finally, preliminary results are presented from an investigation into defects that form in the thin films in the antiferroelectric smectic phases, with the aim of studying how the elastic constants may affect the stability of the intermediate phases.
5

Royles, Adam John. "Electric-field-induced phase transformations in lead-free piezoelectric ceramics." Thesis, University of Leeds, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578687.

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Solid-solutions of perovskite sodium bismuth titan ate modified with potassium bismuth titanate can be fabricated by a conventional mixed oxide processing route to produce a range of highly dense polycrystalline ceramics for the 0.1 < x < 0.3 xNa0.5Bi0.5TiO3-1-xK05Bi0.5TiO3 series. Sintered ceramics are shown to be single phase rhombohedral in the compositional range 0.1
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Pilla, S. "Electric-field induced glass phase in molecular solids at low temperatures." [Gainesville, Fla.] : University of Florida, 1999. http://etd.fcla.edu/etd/uf/1999/amp7406/pilla.pdf.

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Thesis (Ph. D.)--University of Florida, 1999.
Title from first page of PDF file. Document formatted into pages; contains xi, 95 p.; also contains graphics (some colored). Vita. Includes bibliographical references (p. 90-94).
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An, Ran. "Study of the field-induced phase transition for the antiferromagnetic chain /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?MATH%202006%20AN.

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Gustainis, Peter. "Field induced phase transition in one dimensional Heisenberg antiferromagnet model studied using density matrix renormalization group." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61214.

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This thesis examines the Heisenberg antiferromagnetic spin chain in one dimension (1D) with a crystal field splitting term and applied magnetic field term. We use theoretical techniques from quantum field theory and conformal field theory (CFT) to make predictions about the excitation spectrum for our model. We then use Density Matrix Renormalization Group (DMRG) numerical techniques to simulate our spin chain and extract the energy spectrum as we vary our crystal field splitting and magnetic field terms. These results are compared and we examine where theoretical calculations accurately describe our system. This work is motivated by recent experimental work done on SrNi₂Vi₂O₈ by Bera et al. [1] which is a quasi-1D material with weakly coupled spin chains in the bulk. These 1D chains are expected to be described by the Hamiltonian we study in this thesis, and we neglect interchain coupling. We first consider our system where the crystal field splitting term is set to zero, which can be described theoretically using a mapping to the non linear sigma model (NLSM). Near the critical field, it undergoes a Bose condensation transition whose excitation spectrum can be mapped to non-interacting fermions in 1D. We then consider large negative crystal field splitting, and find that near small applied magnetic field we can describe some excited states using Landau-Ginsburg theory. Near critical field, we show that the transition is in the Ising universality, and use results from CFT to predict the spectrum for finite size systems. This allows us to make predictions about where the transition field would be for very large or infinite system size. Finally, we examine our crystal field splitting tuned to the value obtained in Ref. 1, which is a small, negative value. We observe qualitative elements in this spectrum from the spectra obtained at zero and large negative crystal field splitting.
Science, Faculty of
Physics and Astronomy, Department of
Graduate
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Leist, Jeannis-Nicos, Jakob Sidoruk, Holger Gibhardt, Klaudia Hradil, Martin Meven, and Götz Eckold. "Domain redistribution and ferroelectric phase transition in SrTiO 3 under the influence of an electric field and mechanical stress." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-187976.

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Leist, Jeannis-Nicos, Jakob Sidoruk, Holger Gibhardt, Klaudia Hradil, Martin Meven, and Götz Eckold. "Domain redistribution and ferroelectric phase transition in SrTiO 3 under the influence of an electric field and mechanical stress." Diffusion fundamentals 12 (2010) 69, 2010. https://ul.qucosa.de/id/qucosa%3A13899.

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Books on the topic "Electric field induced phase transition":

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Tiwari, Sandip. Phase transitions and their devices. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198759874.003.0004.

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Phase transitions as a collective response of an ensemble, with appearance of unique stable properties spontaneously, is critical to a variety of devices: electronic, magnetic, optical, and their coupled forms. This chapter starts with a discussion of broken symmetry and its manifestation in the property changes in thermodynamic phase transition and the Landau mean-field articulation. It then follows it with an exploration of different phenomena and their use in devices. The first is ferroelectricity—spontaneous electric polarization—and its use in ferroelectric memories. Electron correlation effects are explored, and then conductivity transition from electron-electron and electron-phonon coupling and its use in novel memory and device forms. This is followed by development of an understanding of spin correlations and interactions and magnetism—spontaneous magnetic polarization. The use and manipulation of the magnetic phase transition in disk drives, magnetic and spin-torque memory as well as their stability is explored. Finally, as a fourth example, amorphous-crystalline structural transition in optical, electronic, and optoelectronic form are analyzed. This latter’s application include disk drives and resistive memories in the form of phase-change as well as those with electochemical transport.

Book chapters on the topic "Electric field induced phase transition":

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Li, Zhen Rong, Jun Jie Qian, Guo Qiang Zhang, Zeng Zhe Xi, Zhuo Xu, and Xi Yao. "Dielectric Properties and Phase Transition of [110]-Oriented 0.68PMN-0.32PT Single Crystals Induced by Temperature and DC Electric Field." In Key Engineering Materials, 42–45. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-410-3.42.

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Cui, Yanguang, Jianfeng Wan, Jihua Zhang, and Yonghua Rong. "Strain-Induced Phase Transition in Martensitic Alloys: Phase-Field Simulation." In PRICM, 2781–90. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118792148.ch344.

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Cui, Yanguang, Jianfeng Wan, Jihua Zhang, and Yonghua Rong. "Strain-Induced Phase Transition in Martensitic Alloys: Phase-Field Simulation." In Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing, 2781–90. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-48764-9_344.

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Schenstrom, A., M.-F. Xu, Y. Hong, D. Bein, M. Levy, Bimal K. Sarma, S. Adenwalla, et al. "Anisotropy of the Magnetic-Field-Induced Phase Transition in Superconducting UPt3." In Ten Years of Superconductivity: 1980–1990, 193–96. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-011-1622-0_21.

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Faist, Jérôme, Federico Capasso, Albert L. Hutchinson, Loren Pfeiffer, Ken W. West, Deborah L. Sivco, and Alfred Y. Cho. "Modulation of the Optical Absorption by Electric-Field-Induced Quantum Interference in Coupled Quantum Wells." In Quantum Well Intersubband Transition Physics and Devices, 313–19. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1144-7_25.

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Kutnjak-Urbanc, B., and B. Žekš. "The Phase Transition from the SmC* to the Smc Phase Induced By an External Magnetic Field." In NATO ASI Series, 365–72. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4684-9151-7_23.

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Palffy-Muhoray, P., H. J. Yuan, B. J. Frisken, and W. van Saarloos. "The Formation and Propagation of Fronts at the Electric Field Induced Bend Freedericksz Transition." In NATO ASI Series, 313–18. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4684-5793-3_30.

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Owen, David A. "A Phase Transition of QED, Schwinger’s Proper Time Formalism; Chemical Potential and Electric Field." In Vacuum Structure in Intense Fields, 263–72. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4757-0441-9_16.

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Wu, J. J., Gan-Sing Ong, and Shu-Hsia Chen. "Observation of optical field induced first-order electric Freedericksz transition and electric bistability in a parallel aligned nematic liquid-crystal film." In Opticals Effects in Liquid Crystals, 152–54. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-011-3180-3_17.

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Okimura, Kunio, Yusuke Nihei, and Yusuke Sasakawa. "Electric Field Induced Metal-Insulator Transition of Vanadium Dioxide Films on Sapphire Substrate Prepared by Inductively Coupled Plasma-Assisted Sputtering." In Solid State Phenomena, 703–6. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-31-0.703.

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Conference papers on the topic "Electric field induced phase transition":

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Yin, Shizhuo, Wenbin Zhu, Ju-Hung Chao, Chang-Jiang Chen, Adrian Campbell, Michael Henry, and Robert C. Hoffman. "Nanosecond KTN varifocal lens without electric field induced phase transition." In Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XI, edited by Shizhuo Yin and Ruyan Guo. SPIE, 2017. http://dx.doi.org/10.1117/12.2276511.

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Zhan, Chun, Juntao Wu, Xiaoning Jiang, and Shizhuo Yin. "Strong AC electric-field-induced phase transition in PMN-PT single crystal." In Optical Science and Technology, the SPIE 49th Annual Meeting, edited by Francis T. S. Yu, Ruyan Guo, and Shizhuo Yin. SPIE, 2004. http://dx.doi.org/10.1117/12.558659.

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Inagaki, Takahiro, Tadayuki Imai, Jun Miyazu, Hiroki Takesue, and Junya Kobayashi. "Low-voltage optical phase modulation by electric-field-induced phase transition of KTN bulk crystal." In 2014 IEEE Photonics Conference (IPC). IEEE, 2014. http://dx.doi.org/10.1109/ipcon.2014.6995412.

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Sakai, M., Y. Ito, T. Takahara, M. Nakamura, and K. Kudo. "Phase Transition Induced by a Gate Electric Field in (BEDT-TTF)(TCNQ) Single Crystalline Field Effect Transistor." In 2009 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2009. http://dx.doi.org/10.7567/ssdm.2009.p-10-4.

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BELONENKO, M., N. YANYUSHKINA, and N. LEBEDEV. "A FERROELECTRIC PHASE TRANSITION INDUCED BY OSCILLATING ELECTRIC FIELD IN THE PRESENCE OF MAGNETIC FIELD IN CARBON NANOTUBES." In Proceedings of International Conference Nanomeeting – 2011. WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/9789814343909_0063.

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Wang, Feiling, Gene H. Haertling, and Kewen K. Li. "Photo-Activated Phase Transition In Antiferroelectric Thin Films For Optical Switching And Storage*." In Optical Data Storage. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/ods.1994.tud5.

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An electric field induced antiferroelectric (AFE)-to-ferroelectric (FE) phase transition in lead zirconate titanate (PZT) thin films was shown to produce a digital birefringent change in the materials. Such field-induced AFE-to-FE phase transitions may be influenced by the interface between the PZT thin films and certain electrode materials. It has been observed that soft-ultraviolet (UV) illumination to PZT thin films effectively lift the interfacial suppression to the phase transition. Therefore, soft-UV light may be used as a writing beam to change the polarization state of the PZT thin films via the photo-activated AFE-to-FE phase transition.
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Tyunina, M., K. Kundzins, Vismants Zauls, and Juhani Levoska. "Glass to ferroelectric phase transition induced by ac electric field in PbMg1/3Nb2/3O3 thin films." In SPIE Proceedings, edited by Andris Krumins, Donats Millers, Inta Muzikante, Andris Sternbergs, and Vismants Zauls. SPIE, 2003. http://dx.doi.org/10.1117/12.515667.

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Roy, Dhiman, and Mahbub Alam. "An ultra-low energy efficient topological field-effect transistor based on stanene under perpendicular electric field induced topological phase transition." In 2022 12th International Conference on Electrical and Computer Engineering (ICECE). IEEE, 2022. http://dx.doi.org/10.1109/icece57408.2022.10088910.

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Tan, X., and W. Qu. "Electric field-induced phase transitions in ferroelectric oxides: An in situ TEM study (Invited)." In 2008 17th IEEE International Symposium on the Applications of Ferroelectrics (ISAF). IEEE, 2008. http://dx.doi.org/10.1109/isaf.2008.4693911.

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Gong, Xiaoyan, Honghui Yu, Zhigang Suo, and Robert M. McMeeking. "Cracking in Ferroelectric and Antiferroelectric Ceramic Multilayer Actuators." In ASME 1996 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/imece1996-0686.

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Abstract This paper models cracking in the poling process of a ferroelectric actuator and the operation of an antiferroelectric actuator. In each case, domain switching or phase transition produces large electric displacement and strain. Around an internal electrode edge, such strain causes cracking, which, in turn, is a precursor to electrical breakdown. We model domain switching or phase transition by large increases of both the electric displacement and field induced strain under a small change in the electric field near the coercive field. Ignoring the stress contribution to the electric field, we solve the electric field around the internal electrode edge for nonlinear electric field and electric displacement relations. We then solve a standard elastic residual strain problem to determine the stresses in the structure. Fracture mechanics is then used to determine the cracking conditions in actuators. We find that a critical thickness exists, below which cracking will not occur. This agrees with the prediction of Hao et al (1996), and Gong and Suo (1996).

Reports on the topic "Electric field induced phase transition":

1

Johra, Hicham. Performance overview of caloric heat pumps: magnetocaloric, elastocaloric, electrocaloric and barocaloric systems. Department of the Built Environment, Aalborg University, January 2022. http://dx.doi.org/10.54337/aau467469997.

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Heat pumps are an excellent solution to supply heating and cooling for indoor space conditioning and domestic hot water production. Conventional heat pumps are typically electrically driven and operate with a vapour-compression thermodynamic cycle of refrigerant fluid to transfer heat from a cold source to a warmer sink. This mature technology is cost-effective and achieves appreciable coefficients of performance (COP). The heat pump market demand is driven up by the urge to improve the energy efficiency of building heating systems coupled with the increase of global cooling needs for air-conditioning. Unfortunately, the refrigerants used in current conventional heat pumps can have a large greenhouse or ozone-depletion effect. Alternative gaseous refrigerants have been identified but they present some issues regarding toxicity, flammability, explosivity, low energy efficiency or high cost. However, several non-vapour-compression heat pump technologies have been invented and could be promising alternatives to conventional systems, with potential for higher COP and without the aforementioned refrigerant drawbacks. Among those, the systems based on the so-called “caloric effects” of solid-state refrigerants are gaining large attention. These caloric effects are characterized by a phase transition varying entropy in the material, resulting in a large adiabatic temperature change. This phase transition is induced by a variation of a specific external field applied to the solid refrigerant. Therefore, the magnetocaloric, elastocaloric, electrocaloric and barocaloric effects are adiabatic temperature changes in specific materials when varying the magnetic field, uniaxial mechanical stress, electrical field or hydrostatic pressure, respectively. Heat pump cycle can be built from these caloric effects and several heating/cooling prototypes were developed and tested over the last few decades. Although not a mature technology yet, some of these caloric systems are well suited to become new efficient and sustainable solutions for indoor space conditioning and domestic hot water production. This technical report (and the paper to which this report is supplementary materials) aims to raise awareness in the building community about these innovative caloric systems. It sheds some light on the recent progress in that field and compares the performance of caloric systems with that of conventional vapour-compression heat pumps for building applications.
2

Morosan, Emilia. Field-induced magnetic phase transitions and correlated electronic states in the hexagonal RAgGE and RPtIn series. Office of Scientific and Technical Information (OSTI), January 2005. http://dx.doi.org/10.2172/850112.

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Lui, Rui, Cheng Zhu, John Schmalzel, Daniel Offenbacker, Yusuf Mehta, Benjamin Barrowes, Danney Glaser, and Wade Lein. Experimental and numerical analyses of soil electrical resistivity under subfreezing conditions. Engineer Research and Development Center (U.S.), April 2024. http://dx.doi.org/10.21079/11681/48430.

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The engineering behavior of frozen soils is critical to the serviceability of civil infrastructure in cold regions. Among various geophysical techniques, electrical resistivity imaging is a promising technique that is cost effective and provides spatially continuous subsurface information. In this study, under freeze–thaw conditions, we carry out lab–scale 1D electrical resistivity measurements on frost–susceptible soils with varying water content and bulk density properties. We use a portable electrical resistivity meter for temporal electrical resistivity measurements and thermocouples for temperature monitoring. Dynamic temperature-dependent soil properties, most notably unfrozen water content, exert significant influences on the observed electrical resistivity. Below 0 °C, soil resistivity increases with the decreasing temperature. We also observe a hysteresis effect on the evolution of electrical resistivity during the freeze–thaw cycle, which effect we characterize with a sigmoidal model. At the same temperature, electrical resistivity during freezing is consistently lower than that during thawing. We have implemented this sigmoidal model into a COMSOL finite element model at both laboratory and field scales which enables the simulation of soil electrical resistivity response under both short–term and long–term sub–freezing conditions. Atmospheric temperature variations induce soil temperature change, and thereby phase transition and electrical resistivity change, with the rate of change being a function of the depth of investigation and soil properties include initial water content and initial temperature. This study advances the fundamental understanding of the electrical behaviors of frozen soils and enhance the application of electrical geophysical investigations in cold regions.

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