Artigos de revistas: "Electric field induced phase transition"

1

Lelidis, I., e G. Durand. "Electric-field-induced isotropic-nematic phase transition". Physical Review E 48, n.º 5 (1 de novembro de 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 e Wei-Feng Rao. "Two Consecutive Negative Electrocaloric Peaks in <001>-Oriented PMN-30PT Single Crystals". Crystals 14, n.º 5 (12 de maio de 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.

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Hinterstein, Manuel, Michael Knapp, Markus Hölzel, Wook Jo, Antonio Cervellino, Helmut Ehrenberg e Hartmut Fuess. "Field-induced phase transition in Bi1/2Na1/2TiO3-based lead-free piezoelectric ceramics". Journal of Applied Crystallography 43, n.º 6 (13 de outubro de 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.

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4

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

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5

Tao, R. "Electric-field-induced phase transition in electrorheological fluids". Physical Review E 47, n.º 1 (1 de janeiro de 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, n.º 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.

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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, n.º 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.

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8

Li, Zhen Rong, Jun Jie Qian, Guo Qiang Zhang, Zeng Zhe Xi, Zhuo Xu e 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 (abril de 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 e Desheng Fu. "The electric field induced ferroelectric phase transition of AgNbO3". Journal of Applied Physics 119, n.º 6 (10 de fevereiro de 2016): 064102. http://dx.doi.org/10.1063/1.4941319.

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

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Li, Changhui, Xiangqun Zhang, Zhaohua Cheng e Young Sun. "Electric field induced phase transition in charge-ordered LuFe2O4". Applied Physics Letters 93, n.º 15 (13 de outubro de 2008): 152103. http://dx.doi.org/10.1063/1.3001591.

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Giacomelli, Fernando C., Nádya P. da Silveira, Frédéric Nallet, Petr Černoch, Miloš Steinhart e Petr Štěpánek. "Cubic to Hexagonal Phase Transition Induced by Electric Field". Macromolecules 43, n.º 9 (11 de maio de 2010): 4261–67. http://dx.doi.org/10.1021/ma1000817.

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13

Shabbir, Ghulam. "Aging Behavior and Electric Field Induced Instabilities in Lead Magnesium Niobate - Titanate Relaxor Ferroelectric Single Crystal". Key Engineering Materials 778 (setembro de 2018): 212–16. http://dx.doi.org/10.4028/www.scientific.net/kem.778.212.

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The aging characteristics and influence of electric field poling on the phase transitions in (1-x)Pb (Mg1/3Nb2/3)O3-xPbTiO3 (PMN-xPT) [110]-oriented single crystal were examined through temperature dependent complex capacitance study. In addition to two phase transition anomalies exhibited by the crystal in the virgin state, other phase transition instabilities were observed in the complex capacitance of the crystal under the external applied electric field. The aging behavior deviated from the linear logarithmic law and followed the stretched exponential expression typical for relaxor ferroelectrics. Moreover, aging decreased with frequency while it became faster with increase in temperature towards the paraelectric – ferroelectric structural phase transition temperature.

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14

Kawasugi, Yoshitaka, Hikaru Masuda, Jiang Pu, Taishi Takenobu, Hiroshi M. Yamamoto, Reizo Kato e Naoya Tajima. "Electric Double Layer Doping of Charge-Ordered Insulators α-(BEDT-TTF)2I3 and α-(BETS)2I3". Crystals 11, n.º 7 (7 de julho de 2021): 791. http://dx.doi.org/10.3390/cryst11070791.

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Field-effect transistors based on strongly correlated insulators are an excellent platform for studying the electronic phase transition and simultaneously developing phase transition transistors. Molecular conductors are suitable for phase transition transistors owing to the high tunability of the electronic states. Molecular Mott transistors show field-induced phase transitions including superconducting transitions. However, their application to charge-ordered insulators is limited. In this study, we fabricated electric double layer transistors based on quarter-filled charge-ordered insulators α-(BEDT-TTF)2I3 and α-(BETS)2I3. We observed ambipolar field effects in both compounds where both electron and hole doping (up to the order of 1013 cm−2) reduces the resistance by the band filling shift from the commensurate value. The maximum field-effect mobilities are approximately 10 and 55 cm2/Vs, and the gate-induced conductivities are 0.96 and 3.6 e2/h in α-(BEDT-TTF)2I3 and α-(BETS)2I3, respectively. However, gate-induced metallic conduction does not emerge. The gate voltage dependence of the activation energy in α-(BEDT-TTF)2I3 and the Hall resistance in α-(BETS)2I3 imply that the electric double layer doping in the present experimental setup induces hopping transport rather than band-like two-dimensional transport.

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15

Wang, Peng-Fei, Qianqian Hu, Tan Zheng, Yu Liu, Xiaofeng Xu e Jia-Lin Sun. "Optically Monitored Electric-Field-Induced Phase Transition in Vanadium Dioxide Crystal Film". Crystals 10, n.º 9 (29 de agosto de 2020): 764. http://dx.doi.org/10.3390/cryst10090764.

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Vanadium dioxide (VO2), due to its electrically induced metal-to-insulator transition with dramatic changes in electrical and optical properties, is considered to be a powerful material for electro-optical devices. However, there are still some controversies about phase transition mechanism under voltage. Here, based on optical characterizations on VO2 crystal nanofilm during the whole process of phase transition, temporal evolution and spatial distribution of changes in electricity, optic and temperature are investigated simultaneously, to explore the mechanism. The variations of Raman spectrum and reflected spectrum, and changes in current and temperature are evidences for occurrence of phase transition, which exhibit different changing behaviors with time and space. These results offer a better understanding of the phase transition mechanism, implying that lattice structure of VO2 changes gradually after applying voltage until the structure is completely converted to metallic structure, which causes a rapid increase in carrier density, resulting in a rapid change in current, reflected spectrum and temperature. Temperature rise before phase transition and applied electric field alone are not enough for triggering metal-insulator transition, but these two factors can act synergistically on structural transformation to induce phase transition.

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Lü, Xiao-Long, e Hang Xie. "Topological edge states and transport properties in zigzag stanene nanoribbons with magnetism". New Journal of Physics 24, n.º 3 (1 de março de 2022): 033010. http://dx.doi.org/10.1088/1367-2630/ac4009.

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Abstract In this work, we investigate the topological phase transitions and corresponding transport properties in zigzag stanene nanoribbon with different magnetism. The results show that the off-resonant circularly polarized (ORCP) light may induce anisotropic chiral edge state with a magnetic phase transition from antiferromagnetic state to nonmagnetic state. In combination with the ORCP light and electric field, the 100% spin-polarized edge state can be induced with some magnetic orders. The finite-size effect is also an important factor for the magnetic phase transitions, which in turn induces topological phase transitions from the band insulator to topological phases. By constructing the topological-insulator junctions with some topological edge states, we further study the Fabry–Perot resonant, where multiple reflection edge states cause strong current loops. By modulating the ORCP and electric field, the system can also be regarded as a switcher, to control the charge current or spin polarized current. These findings pave a way for designing topological device with magnetic edges in the future nano spintronics.

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Helal, Md Al, e Seiji Kojima. "Effect of electric field on elastic properties of BaTiO₃ single crystals: a micro-Brillouin scattering study". Japanese Journal of Applied Physics 61, SG (22 de março de 2022): SG1016. http://dx.doi.org/10.35848/1347-4065/ac4c6f.

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The analysis of local polar clusters formed by random fields in ferroelectrics is of technical and fundamental importance in understanding piezoelectricity. The temperature and electric field dependences of elastic properties and the ferroelectric phase transition have been investigated in (100)-oriented BaTiO3 single crystals by micro-Brillouin scattering. In the field cooling process, LA phonons are scattered by polar clusters. As a result, the LA phonon frequency increases as compared with that of the zero-field cooling process. Under the application of an external electric field along the [100] direction in the tetragonal ferroelectric phase, a complete 90° domain switching is accomplished. Under the electric field, abrupt changes in the frequency shift and FWHM of the LA phonons in the paraelectric cubic phase indicate the occurrence of a phase transition from the cubic to the tetragonal phase. An E–T phase diagram has been proposed from the field-induced phase transition.

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Moshnyaga, Vasily, e Konrad Samwer. "Polaronic Emergent Phases in Manganite-based Heterostructures". Crystals 9, n.º 10 (22 de setembro de 2019): 489. http://dx.doi.org/10.3390/cryst9100489.

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Transition metal functional oxides, e.g., perovskite manganites, with strong electron, spin and lattice correlations, are well-known for different phase transitions and field-induced colossal effects at the phase transition. Recently, the interfaces between dissimilar perovskites were shown to be a promising concept for the search of emerging phases with novel functionalities. We demonstrate that the properties of manganite films are effectively controlled by low dimensional emerging phases at intrinsic and extrinsic interfaces and appeared as a result of symmetry breaking. The examples include correlated Jahn–Teller polarons in the phase-separated (La1−yPry)0.7Ca0.3MnO3, electron-rich Jahn–Teller-distorted surface or “dead” layer in La0.7Sr0.3MnO3, electric-field-induced healing of “dead” layer as an origin of resistance switching effect, and high-TC ferromagnetic emerging phase at the SrMnO3/LaMnO3 interface in superlattices. These 2D polaronic phases with short-range electron, spin, and lattice reconstructions could be extremely sensitive to external fields, thus, providing a rational explanation of colossal effects in perovskite manganites.

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Li, Xiaojin, Quanxin Yang, Xin Zhang, Shan He, Hongliang Liu e Pengfei Wu. "Low DC Electric-Field-Induced Phase Transition in KTa0.59Nb0.41O3 Crystal". Crystal Growth & Design 20, n.º 2 (13 de dezembro de 2019): 1248–53. http://dx.doi.org/10.1021/acs.cgd.9b01509.

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Thürk, Marcel, e Dietmar Porschke. "Phase transition of dimyristoylphosphatidylglycerol bilayers induced by electric field pulses". Biochimica et Biophysica Acta (BBA) - Biomembranes 1067, n.º 2 (agosto de 1991): 153–58. http://dx.doi.org/10.1016/0005-2736(91)90037-9.

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He, Hui-Kai, Yong-Bo Jiang, Jun Yu, Zi-Yan Yang, Chao-Fan Li, Ting-Ze Wang, De-Quan Dong et al. "Ultrafast and stable phase transition realized in MoTe₂-based memristive devices". Materials Horizons 9, n.º 3 (2022): 1036–44. http://dx.doi.org/10.1039/d1mh01772a.

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An electric-field induced phase transition between semiconducting 2H and metallic 1T′ phases in a MoTe2 device is demonstrated for the first time. The phase transition exhibits faster switching compared with phase-change random-access memory (PCRAM), and shows more controllable switching than conventional memristive devices.

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Ando, Ryosuke, Ryo Watanuki, Kazuhiro Kudo, Hyuma Masu e Masatoshi Sakai. "Phase Transition Field Effect Transistor Observed in an α-(BEDT-TTF)2I3 Single Crystal". Solids 4, n.º 3 (1 de agosto de 2023): 201–12. http://dx.doi.org/10.3390/solids4030013.

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The metal–insulator transition induced by the gate electric field in the charge order phase of the α-(BEDT-TTF)2I3 single-crystal field-effect transistor (FET) structure was clearly observed near the phase transition temperature. An abrupt increase in the electrical conductance induced by the applied gate electric field was evident, which corresponds to the partial dissolution of the charge order phase triggered by the gate electric field. The estimated nominal dissolved charge order region (i.e., the gate-induced metallic region) was overestimated in 130–150 K, suggesting additional effects such as Joule heating. On the other hand, in the lower temperature region below 120 K, the corresponding dissolved charge order was several monolayers of BEDT-TTF, suggesting that it is possible to dissolve the charge order phase within the bistable temperature region.

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Li, Xian, Tian Qiu, Jiahao Zhang, Edoardo Baldini, Jian Lu, Andrew M. Rappe e Keith A. Nelson. "Terahertz field–induced ferroelectricity in quantum paraelectric SrTiO3". Science 364, n.º 6445 (13 de junho de 2019): 1079–82. http://dx.doi.org/10.1126/science.aaw4913.

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“Hidden phases” are metastable collective states of matter that are typically not accessible on equilibrium phase diagrams. These phases can host exotic properties in otherwise conventional materials and hence may enable novel functionality and applications, but their discovery and access are still in early stages. Using intense terahertz electric field excitation, we found that an ultrafast phase transition into a hidden ferroelectric phase can be dynamically induced in quantum paraelectric strontium titanate (SrTiO3). The induced lowering in crystal symmetry yields substantial changes in the phonon excitation spectra. Our results demonstrate collective coherent control over material structure, in which a single-cycle field drives ions along the microscopic pathway leading directly to their locations in a new crystalline phase on an ultrafast time scale.

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Gorbatenko, V. V., B. N. Prasolov, S. A. Gorbatenko e N. V. Datsenko. "Harmonic Analysis of the Polarization Reversal of the Rb2ZnCl4 Crystal in the Incommensurate Phase". Кристаллография 68, n.º 5 (1 de setembro de 2023): 734–37. http://dx.doi.org/10.31857/s0023476123600453.

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The polarization reversal of Rb2ZnCl4 crystals in the incommensurate phase near a ferroelectric phase transition (PT) under the action of harmonic electric field has been studied using harmonic analysis. During polarization reversal of a test sample under the action of harmonic electric field, a PT induced by the electric field from the incommensurate phase to the ferroelectric phase and a PT from the field-induced ferroelectric phase back to the incommensurate phase occur. The study of the active and reactive contributions to the amplitudes of current density harmonics made it possible to determine the current values of harmonic electric field intensity at which the corresponding PTs occur.

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GAO, J., E. J. GUO, S. Y. WANG, Z. P. WU e H. J. BU. "TUNABLE PHASE TRANSITION AND PHOTO-INDUCED RESISTANCE IN La0.8Ca0.2MnO3/FERROELECTRIC HETEROSTRUCTURES". Modern Physics Letters B 27, n.º 22 (20 de agosto de 2013): 1350162. http://dx.doi.org/10.1142/s0217984913501625.

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Heterostructures of La 0.8 Ca 0.2 MnO 3 (LCMO)/ferroelectric were formed by growing a layer of perovskite manganite LCMO on the ferroelectric 0.67 Pb ( Mg 1/3 Nb 2/3) O 3-0.33 PbTiO 3 (PMN-PT) single crystals. Well tunable structural, magnetic, and transport properties were achieved by applying electric fields on the formed heterostructures. By varying electric fields biased on the PMN-PT, the metal–insulator transition and resistance could be modulated continuously and reversely. Field modulation of photo-induced resistance (PR) was also observed. In situ X-ray diffraction indicates that the variation of resistance and PR result from the induced strain due to the coaction ferroelectric polarization or converse piezoelectric effect. The variations of PR under different fields differ significantly when PMN-PT was in positively and negatively polarized states. Such observations could be explained based on the coaction of piezoelectric effect and ferroelectric-field polarization, which subsequently affect the lattice strain and density of charge carrier in the grown LCMO layer.

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Nan, Tianxiang, Yeonbae Lee, Shihao Zhuang, Zhongqiang Hu, James D. Clarkson, Xinjun Wang, Changhyun Ko et al. "Electric-field control of spin dynamics during magnetic phase transitions". Science Advances 6, n.º 40 (outubro de 2020): eabd2613. http://dx.doi.org/10.1126/sciadv.abd2613.

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Controlling magnetization dynamics is imperative for developing ultrafast spintronics and tunable microwave devices. However, the previous research has demonstrated limited electric-field modulation of the effective magnetic damping, a parameter that governs the magnetization dynamics. Here, we propose an approach to manipulate the damping by using the large damping enhancement induced by the two-magnon scattering and a nonlocal spin relaxation process in which spin currents are resonantly transported from antiferromagnetic domains to ferromagnetic matrix in a mixed-phased metallic alloy FeRh. This damping enhancement in FeRh is sensitive to its fraction of antiferromagnetic and ferromagnetic phases, which can be dynamically tuned by electric fields through a strain-mediated magnetoelectric coupling. In a heterostructure of FeRh and piezoelectric PMN-PT, we demonstrated a more than 120% modulation of the effective damping by electric fields during the antiferromagnetic-to-ferromagnetic phase transition. Our results demonstrate an efficient approach to controlling the magnetization dynamics, thus enabling low-power tunable electronics.

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ZHOU, L. W., J. F. YE, R. B. TAO, Y. TANG, J. F. PENG, Z. GAO, L. Y. LIU, S. H. MA e W. C. WANG. "PRELIMINARY OPTICAL STUDY ON ER FLUIDS". International Journal of Modern Physics B 08, n.º 20n21 (setembro de 1994): 2921–33. http://dx.doi.org/10.1142/s0217979294001214.

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Linear and nonlinear optical study on electrorheological (ER) fluids is reported. The ER fluids under the investigation were glass beads, zeolite and ferroelectrics. The linear optical response of some ER fluids showed sharp changes near critical electric fields. An enhancement of electric field induced second harmonic generations (EFISH) was observed as the function of E2, where E is the external electric field. The said enhancement is considered to be corresponding to a modulation of the material's refractive index associated with the electric field induced polarization of the delocalized electrons. The enhanced nonlinear optical response on the transition between liquid and solid states can be related to the phase transition in ER fluids.

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Lyu, Jing, Zicong Marvin Wong, Haicheng Sun, Shuo-Wang Yang e Guo Qin Xu. "Electric Field-Induced Phase Transition of Nanowires on Germanium(001) Surfaces". Journal of Physical Chemistry Letters 13, n.º 4 (25 de janeiro de 2022): 1063–68. http://dx.doi.org/10.1021/acs.jpclett.1c04020.

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Kamzina, L. S., e N. N. Krainik. "Electric-field-induced phase transition in single-crystal lead zinc niobate". Physics of the Solid State 40, n.º 3 (março de 1998): 485–88. http://dx.doi.org/10.1134/1.1130315.

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Gorev, M. V., V. S. Bondarev e K. S. Aleksandrov. "Heat capacity of PMN near an electric-field-induced phase transition". JETP Letters 85, n.º 6 (maio de 2007): 283–85. http://dx.doi.org/10.1134/s0021364007060045.

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Gordon, A., B. E. Vugmeister, S. Dorfman e H. Rabitz. "Depolarization excitation as an electric field-induced first-order phase transition". Physica B: Condensed Matter 292, n.º 3-4 (novembro de 2000): 257–63. http://dx.doi.org/10.1016/s0921-4526(00)00476-2.

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Zhang, Mao-Hua, Lovro Fulanović, Sonja Egert, Hui Ding, Pedro B. Groszewicz, Hans-Joachim Kleebe, Leopoldo Molina-Luna e Jurij Koruza. "Electric-field-induced antiferroelectric to ferroelectric phase transition in polycrystalline NaNbO3". Acta Materialia 200 (novembro de 2020): 127–35. http://dx.doi.org/10.1016/j.actamat.2020.09.002.

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Duan, Xiaodong, e Weili Luo. "EVIDENCE OF SECOND ORDER PHASE TRANSITION OF FERROFLUID IN EXTERNAL ELECTRIC FIELD". International Journal of Modern Physics B 15, n.º 06n07 (20 de março de 2001): 837–41. http://dx.doi.org/10.1142/s0217979201005349.

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When a DC electric field is applied perpendicular to a thin film of ferrofluid constrained between two conducting plates, the ferrofluid separates into phases that are concentrated and dilute in magnetic particles for field strength above a critical value. The phase separation stems from the competition between the electrostatic energy and entropy of the induced dipoles. The entropy around the critical value of the phase separation is continues in our experiment indicating the transition is second order.

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Meyer, Claire, Christophe Blanc, Geoffrey R. Luckhurst, Patrick Davidson e Ivan Dozov. "Biaxiality-driven twist-bend to splay-bend nematic phase transition induced by an electric field". Science Advances 6, n.º 36 (setembro de 2020): eabb8212. http://dx.doi.org/10.1126/sciadv.abb8212.

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Although the existence of the twist-bend (NTB) and splay-bend (NSB) nematic phases was predicted long ago, only the former has as yet been observed experimentally, whereas the latter remains elusive. This is especially disappointing because the NSB nematic is promising for applications in electro-optic devices. By applying an electric field to a planar cell filled with the compound CB7CB, we have found an NTB-NSB phase transition using birefringence measurements. This field-induced transition to the biaxial NSB occurred, although the field was applied along the symmetry axis of the macroscopically uniaxial NTB. Therefore, this transition is a counterintuitive example of breaking of the macroscopic uniaxial symmetry. We show by theoretical modeling that the transition cannot be explained without considering explicitly the biaxiality of both phases at the microscopic scale. This strongly suggests that molecular biaxiality should be a key factor favoring the stability of the NSB phase.

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35

Камзина, Л. С., Л. А. Кулакова e H. Luo. "Временные зависимости диэлектрических и акустических свойств в монокристаллах PbFe-=SUB=-0.5-=/SUB=-Nb-=SUB=-0.5-=/SUB=-O-=SUB=-3-=/SUB=- и PbFe-=SUB=-0.5-=/SUB=-Nb-=SUB=-0.5-=/SUB=-O-=SUB=-3-=/SUB=---7PbTiO-=SUB=-3-=/SUB=-". Физика твердого тела 61, n.º 4 (2019): 703. http://dx.doi.org/10.21883/ftt.2019.04.47416.308.

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AbstractThe time changes of permittivity, damping and velocity of sound are studied for PbFe_0.5Nb_0.5O_3 and PbFe_0.5Nb_0.5O_3–7PbTiO_3 single crystals in the electric fields of 0 < E < 6 kV/cm. The room-temperature local symmetry of these compounds is shown to be rather more monoclinic than rhombohedral, which is typical of other similar systems. No abrupt sound attenuation anomalies are observed upon the phase transition into the ferroelectric phase in the electric field. The effects seem to be far from the crystal symmetry changes and are attributed to the gradual transition of near-range monoclinic domains into long-range monoclinic domains, as well as to the emergence of the ferroelectric phase. The polarized phase induced in the electric field is only partially stable.

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Porsch, F., e H. Stegemeyer. "Electric Field Induced Phase Transitions in Liquid-Crystalline Blue Phases". Liquid Crystals 2, n.º 3 (maio de 1987): 395–99. http://dx.doi.org/10.1080/02678298708086684.

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Li, Jun, Dongpeng Zhao, Han Bai, Zhi Yuan e Zhongxiang Zhou. "Low magnetic-field induced high temperature dynamic magnetoelectric coupling performances in Z-type Sr₃Co₂Fe₂₄O₄₁". Journal of Physics: Condensed Matter 34, n.º 10 (23 de dezembro de 2021): 105803. http://dx.doi.org/10.1088/1361-648x/ac40ae.

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Abstract Magnetic-field induced dynamic magnetoelectric coupling effects and polarization performance of Z-type Sr3Co2Fe24O41 (SCFO) ceramic has been investigated. Results found that SCFO’s transverse tapered magnetic structure can induce electric polarization, and its electric polarization direction will not change under external magnetic effects. First-order dynamic magnetoelectric coupling coefficient (α) and second-order dynamic magnetoelectric coupling coefficient (β) of SCFO exhibited strong response main in magnetic structural phase transition region. The magnetoelectric structural phase transition position appeared in low magnetic field, and the magnetic moment vector and its corresponding electric polarization vector of SCFO exhibited the most unstable state near its equilibrium position, which is beneficial for inducing strong dynamic magnetoelectric coupling response. When the applied magnetic fields to SCFO increased, the magnetic moment stability near the equilibrium position increased, and the dynamic magnetoelectric coupling response decreased. Results showed that the dynamic magnetoelectric coupling response of SCFO can bear T 1 = 370 K high temperature. The dynamic magnetoelectric coupling response induced by low magnetic fields in SCFO contributes to its actual application in next generation magnetoelectric information storage devices.

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38

JIANG, DONGDONG, YUJUN FENG, JINMEI DU e YAN GU. "EFFECTS OF SHOCK PRESSURE AND SELF-GENERATED ELECTRIC FIELD ON SHOCK-INDUCED FERROELECTRIC TO ANTIFERROELECTRIC PHASE TRANSITION IN LEAD ZIRCONATE STANNATE TITANATE FERROELECTRIC CERAMICS". Journal of Advanced Dielectrics 02, n.º 04 (outubro de 2012): 1250026. http://dx.doi.org/10.1142/s2010135x12500269.

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Kinetics of the ferroelectric (FE) to antiferroelectric (AFE) phase transformation under shock wave compression is critical to design the shock-activated power supply and can be characterized in terms of both a transition rate and a limiting degree of transition. By measuring the depoling currents under the short-circuit and high-impedance conditions, we investigated the influence of shock pressure and self-generated electric field on the phase transition kinetics of tin-modified lead zirconate titanate ceramics (Pb0.99Nb0.02[(Zr0.90Sn0.10)0.96Ti0.04]0.98O3) in the pressure range from 0.23 to 4.50 GPa. Experimental results indicate that the shock pressure promotes the FE-to-AFE phase transition. And the self-generated electric field does not appear to have a significant effect on the depoling currents at high shock pressures, but has a strong effect at low pressures. At 0.61 GPa and 1.03 GPa, transition rate and degree diminish with increasing the electric field, illustrating that the self-generated electric field suppresses the FE-to-AFE phase transition. These observations are found to be generally consistent with results under the hydrostatic compression. Fundamental issues are discussed from the perspective of the soft mode theory.

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39

Artemenko, S. N. "Modification of charge density wave fluctuations by charge perturbations". Journal de Physique IV 12, n.º 9 (novembro de 2002): 77–78. http://dx.doi.org/10.1051/jp4:20020359.

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Spectral density of fluctuations of the CDW phase are calculated taking into account electric field induced by phase fluctuations. The approach based upon the fluctuation-dissipation theorem (FDT) combined with equations of linear response of the CDW conductor is used. Fluctuating electric field is found to suppress fluctuations of the phase, while fluctuations of the electric potential are sizeable. This suggests that transition from the CDW to the normal state (which is usually observed well below the mean-field transition temperature) may he provoked by fluctuations of the chemical potential, rather than by destruction of the CDW coherence between conducting chains due to phase fluctuations.

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Камзина, Л. С., e G. Li. "Влияние концентрации La на кинетику индуцированного фазового перехода в прозрачной керамике PbMg-=SUB=-1/3-=/SUB=-Nb-=SUB=-2/3-=/SUB=-O-=SUB=-3-=/SUB=--25PbTiO-=SUB=-3-=/SUB=-". Физика твердого тела 62, n.º 4 (2020): 584. http://dx.doi.org/10.21883/ftt.2020.04.49124.644.

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The effect of La concentration on the kinetic nature of the induced phase transition in PbMg1/3Nb2/3O3–25PbTiO3 ferroceramics was studied. At temperatures below the Vogel-Fulcher temperature, the time-dependent changes in the dielectric constant and optical transmission in electric fields are studied 0 <E <6 kV / cm. It was found that in an electric field in La-containing transparent ceramics, a sharp decrease in the dielectric constant and optical transmission occurs over time, indicating an induced phase transition and an increase in the fraction of the ferroelectric phase. It has been shown that in undoped La ceramics the changes in the dielectric constant at the same fields are much smaller. It was found that the stability of the induced phase depends on the La concentration: the higher the concentration, the lower the stability. The results obtained are explained by both a varying degree of diffuse of the phase transition and different sizes of polar regions, which depend on the La concentration.

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41

Wexler, Adam D., Elmar C. Fuchs, Jakob Woisetschläger e Giuseppe Vitiello. "Electrically induced liquid–liquid phase transition in water at room temperature". Physical Chemistry Chemical Physics 21, n.º 34 (2019): 18541–50. http://dx.doi.org/10.1039/c9cp03192h.

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Sun, Xiaohui, Houbing Huang, Hasnain Mehdi Jafri, Junsheng Wang, Yongqiang Wen e Zhi-Min Dang. "Wide Electrocaloric Temperature Range Induced by Ferroelectric to Antiferroelectric Phase Transition". Applied Sciences 9, n.º 8 (23 de abril de 2019): 1672. http://dx.doi.org/10.3390/app9081672.

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The ferroelectric (FE) to antiferroelectric (AFE) phase transition tuning the temperature range of electrocaloric (EC) effects was investigated using phenomenological Landau–Devonshire theory. Contrary to ferroelectric to paraelectric (PE) phase transitions for electrocaloric effects, the ferroelectric to antiferroelectric phase transition was adopted to obtain large entropy changes under an applied electric field in a Sm-doping BiFeO3 system. In addition, the doping composition and hydrostatic pressure was observed to tune the ferroelectricantiferroelectric–paraelectric phase transition temperatures and broaden the operating temperature range of electrocaloric effects. The optimal wide temperature range of ~78 K was observed at 3 GPa compressive hydrostatic pressures and 0.05 Sm-doping BiFeO3. The present study paves the way to designing high efficiency cooling devices with larger operating temperature spans.

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Wang, Jin Fei, Tong Qing Yang, K. Wei, G. Li e Yong Xiang Li. "Influence of Zr/Sn Ratio Electric Properties of PLZST Ceramic". Key Engineering Materials 547 (abril de 2013): 101–5. http://dx.doi.org/10.4028/www.scientific.net/kem.547.101.

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(Pb0.97La0.02)(Zr0.92-xSnxTi0.08)O3 (PLZST) ferroelectric ceramics with x=0.40, 0.25, 0.15, respectively, were investigated. It was found that these ceramics with different Zr:Sn ratios were perovskite structure. With increasing of Zr:Sn ratio, the phase-transition electric-field of antiferroelectric to ferroelectric phase increased. when x>0.15,All the samples have double hysteresis loops with antiferroelectric phase characteristics. Yet, when the electric field was removed at lower temperature of -5oC and -20oC, for x=0.25 and 0.40, the electric field induced FE phase can remain metastable FE state. But for x=0.15, the induced FE phase recover to AFE phase even at -20oC. Yet, electric field induced FE phase exist as metastable FE phase. TFE-AFE of the samples was -5oC, -20oC, when x=0.40, x=0.25, respectively. With increasing of Zr:Sn ratio, TFE-AFE increaseddecreased, Tc was hardly changed, but the dielectric constant increased from ~2500 to ~6000, the peak changed sharply, dielectric loss increased continuously with increasing of Zr:Sn ratio.

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44

Wang, Jian, Yun Liu, Andrew Studer, Lasse Norén e Ray Withers. "Effect of Electric Field and Temperature on Average Structure and Domain Wall Motion in 0.93Bi0.5Na0.5TiO3-0.07BaTiO3Ceramic". Advances in Condensed Matter Physics 2013 (2013): 1–4. http://dx.doi.org/10.1155/2013/830971.

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In situneutron powder diffraction patterns and dielectric spectra of 0.93Bi0.5Na0.5TiO3-0.07BaTiO3ceramic were investigated under different electrical fields and temperatures. An electric-field-induced phase transition from metrically cubic to metrically tetragonal, associated with strong domain wall motion, occurs. Such induced phase and domain wall motion are unchanged until the high-temperature phase transition occurs from metrically tetragonal to metrically cubic. All these changes are irrelevant to the observed depolarization temperature (75°C). The depolarization behaviour is thus suggested to be associated with the local structure caused by the octahedral tilt twinning disorder.

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45

Bai, Gang, Xueshi Qin, Qiyun Xie e Cunfa Gao. "Electric-field-induced phase transition and electrocaloric effect in PZT near morphotropic phase boundary". Physica B: Condensed Matter 560 (maio de 2019): 208–14. http://dx.doi.org/10.1016/j.physb.2019.02.030.

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Behera, Sushant Kumar, e Pritam Deb. "Controlling the bandgap in graphene/h-BN heterostructures to realize electron mobility for high performing FETs". RSC Advances 7, n.º 50 (2017): 31393–400. http://dx.doi.org/10.1039/c7ra06069f.

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Ren, Fude, Xiaolei Wang, Qing Zhang, Xiaojun Wang, Lingling Chang e Zhiteng Zhang. "Experimental and Theoretical Investigation of External Electric-Field-Induced Crystallization of TKX-50 from Solution by Finite-Temperature String with Order Parameters as Collective Variables for Ionic Crystals". Molecules 29, n.º 5 (5 de março de 2024): 1159. http://dx.doi.org/10.3390/molecules29051159.

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External electric fields are an effective tool to induce phase transformations. The crystallization of ionic crystals from solution is a common phase transformation. However, understanding of mechanisms is poor at the molecular level. In this work, we carried out an experimental and theoretical investigation of the external electric-field-induced crystallization of TKX-50 from saturated formic acid solution by finite-temperature string (FTS) with order parameters (OPs) as collective variables for ionic crystals. The minimum-free-energy path was sketched by the string method in collective variables. The results show that the K-means clustering algorithm based on Euclidean distance and density weights can be used for enhanced sampling of the OPs in external electric-field-induced crystallization of ionic crystal from solution, which improves the conventional FTS. The crystallization from solution is a process of surface-mediated nucleation. The external electric field can accelerate the evolution of the string and decrease the difference in the potential of mean forces between the crystal and the transition state. Due to the significant change in OPs induced by the external electric field in nucleation, the crystalline quality was enhanced, which explains the experimental results that the external electric field enhanced the density, detonation velocity, and detonation pressure of TKX-50. This work provides an effective way to explore the crystallization of ionic crystals from solution at the molecular level, and it is useful for improving the properties of ionic crystal explosives by using external electric fields.

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Soltani, T., A. Gharbi, J. P. Marcerou e S. Gineste. "Electric field induced phase transition in a ferroelectric smectic-C* liquid crystal". European Physical Journal Applied Physics 55, n.º 1 (julho de 2011): 10201. http://dx.doi.org/10.1051/epjap/2011110084.

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Marcus, Gilad, e Yoav Tsori. "Phase Separation Transition in Liquids and Polymers Induced by Electric Field Gradients". Journal of the Physical Society of Japan 78, n.º 4 (15 de abril de 2009): 041010. http://dx.doi.org/10.1143/jpsj.78.041010.

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Lin, G. C., X. M. Xiong, J. X. Zhang e Q. Wei. "Latent heat study of phase transition in Ba0.73Sr0.27TiO3 induced by electric field". Journal of Thermal Analysis and Calorimetry 81, n.º 1 (julho de 2005): 41–44. http://dx.doi.org/10.1007/s10973-005-0742-2.

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