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Relevant bibliographies by topics / Spin Nernst effect

Academic literature on the topic 'Spin Nernst effect'

Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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Dissertations / Theses
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Journal articles on the topic "Spin Nernst effect"

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Zheng, Jun, Jing-Jing Jin, Xin Zhao, Chun-Lei Li, and Yong Guo. "Spin and Charge Nernst Effects in Four-Terminal Ferromagnetic Graphene." SPIN 08, no. 01 (March 2018): 1840001. http://dx.doi.org/10.1142/s2010324718400015.

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The spin and charge Nernst effects in a four-terminal ferromagnetic graphene are theoretically investigated by using the nonequilibrium Green’s function method. The results of this study reveal that (1) when the four leads are normal graphene, the pure charge Nernst effect can be obtained under the assistance of magnetic field, (2) when the ferromagnetic graphene leads are in a parallel configuration of the magnetizations, both the spin and charge Nernst effects can be generated simultaneously, it is worth noting that, for the first two cases, the Nernst effect cannot be obtained without the [Formula: see text] direction magnetic field, and (3) the pure spin Nernst effect (without charge Nernst effect) emerged only by the temperature difference for the antiparallel configuration. In addition, the magnitude of the spin and charge Nernst coefficients can be tuned by adjusting the strength of magnetic flux and exchange field. All the results indicate that the proposed multi-terminal graphene nanosystem is a promising candidate for spin caloritronics devices.

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Brechet, Sylvain D., and Jean-Philippe Ansermet. "Magnetic Nernst effect." Modern Physics Letters B 29, no. 35n36 (December 30, 2015): 1550246. http://dx.doi.org/10.1142/s0217984915502462.

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The thermodynamics of irreversible processes in continuous media predicts the existence of a magnetic Nernst effect that results from a magnetic analog to the Seebeck effect in a ferromagnet and magnetophoresis occurring in a paramagnetic electrode in contact with the ferromagnet. Thus, a voltage that has DC and AC components is expected across a Pt electrode as a response to the inhomogeneous magnetic induction field generated by magnetostatic waves of an adjacent YIG slab subject to a temperature gradient. The voltage frequency and dependence on the orientation of the applied magnetic induction field are quite distinct from that of spin pumping.

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Meyer, S., Y. T. Chen, S. Wimmer, M. Althammer, T. Wimmer, R. Schlitz, S. Geprägs, et al. "Observation of the spin Nernst effect." Nature Materials 16, no. 10 (September 11, 2017): 977–81. http://dx.doi.org/10.1038/nmat4964.

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Sheng, Peng, Yuya Sakuraba, Yong-Chang Lau, Saburo Takahashi, Seiji Mitani, and Masamitsu Hayashi. "The spin Nernst effect in tungsten." Science Advances 3, no. 11 (November 2017): e1701503. http://dx.doi.org/10.1126/sciadv.1701503.

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Yang, Ning-Xuan, Yan-Feng Zhou, Zhe Hou, and Qing-Feng Sun. "Anomalous spin Nernst effect in Weyl semimetals." Journal of Physics: Condensed Matter 31, no. 43 (July 26, 2019): 435301. http://dx.doi.org/10.1088/1361-648x/ab2c7d.

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Bose, Arnab, and Ashwin A. Tulapurkar. "Recent advances in the spin Nernst effect." Journal of Magnetism and Magnetic Materials 491 (December 2019): 165526. http://dx.doi.org/10.1016/j.jmmm.2019.165526.

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Zhang, Hantao, and Ran Cheng. "A perspective on magnon spin Nernst effect in antiferromagnets." Applied Physics Letters 120, no. 9 (February 28, 2022): 090502. http://dx.doi.org/10.1063/5.0084359.

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Magnon excitations in antiferromagnetic materials and their physical implications have helped to facilitate the emergence of device concepts not presently available in ferromagnets. A unique characteristic of antiferromagnetic magnons is the coexistence of opposite spin polarization, which mimics the electron spin in a variety of transport phenomena. Among them, the most prominent spin-contrasting phenomenon is the magnon spin Nernst effect (SNE), which refers to the generation of a transverse pure magnon spin current through a longitudinal temperature gradient. We introduce selected recent progress in the study of magnon SNE in collinear antiferromagnets with focus on its underlying physical mechanism entailing profound topological features of magnon band structures. By reviewing how the magnon SNE has inspired and enriched the exploration of topological magnons, we offer our perspective on this emerging frontier that holds potential in future spintronic nano-technology.

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Bose, A., S. Bhuktare, H. Singh, S. Dutta, V. G. Achanta, and A. A. Tulapurkar. "Direct detection of spin Nernst effect in platinum." Applied Physics Letters 112, no. 16 (April 16, 2018): 162401. http://dx.doi.org/10.1063/1.5021731.

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Wooten, Brandi L., Koen Vandaele, Stephen R. Boona, and Joseph P. Heremans. "Combining Spin-Seebeck and Nernst Effects in Aligned MnBi/Bi Composites." Nanomaterials 10, no. 10 (October 21, 2020): 2083. http://dx.doi.org/10.3390/nano10102083.

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The spin-Seebeck effect (SSE) is an advective transport process traditionally studied in bilayers composed of a ferromagnet (FM) and a non-magnetic metal (NM) with strong spin-orbit coupling. In a temperature gradient, the flux of magnons in the FM transfers spin-angular momentum to electrons in the NM, which by the inverse spin-Hall effect generates an SSE voltage. In contrast, the Nernst effect is a bulk transport phenomenon in homogeneous NMs or FMs. These effects share the same geometry, and we show here that they can be added to each other in a new combination of FM/NM composites where synthesis via in-field annealing results in the FM material (MnBi) forming aligned needles inside an NM matrix with strong spin-orbit coupling (SOC) (Bi). Through examination of the materials’ microstructural, magnetic, and transport properties, we searched for signs of enhanced transverse thermopower facilitated by an SSE contribution from MnBi adding to the Nernst effect in Bi. Our results indicate that these two signals are additive in samples with lower MnBi concentrations, suggesting a new way forward in the study of SSE composite materials.

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Taniguchi, Tomohiro. "Phenomenological Spin Transport Theory Driven by Anomalous Nernst Effect." Journal of the Physical Society of Japan 85, no. 7 (July 15, 2016): 074705. http://dx.doi.org/10.7566/jpsj.85.074705.

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Dissertations / Theses on the topic "Spin Nernst effect"

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Tauber, Katarina Verfasser], Ingrid [Akademischer Betreuer] [Mertig, Steffen [Akademischer Betreuer] Trimper, and Peter [Akademischer Betreuer] Kratzer. "Spin Nernst and spin Hall effect in dilute metallic alloys / Katarina Tauber. Betreuer: Ingrid Mertig ; Steffen Trimper ; Peter Kratzer." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2015. http://d-nb.info/1068208112/34.

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Turčan, Igor. "Studie magnonických krystalů ve frekvenční doméně." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319483.

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Popis magnetodynamických vlastností nanomagnetů a nanostrukturovaných magnetických materiálů vyžaduje metody vhodné pro zkoumání typické časové odezvy těchto systémů, tj. v řádu nanosekund a méně. Nedostatek technik, vhodných právě pro charakterizaci v časové doméně, je spojen s možnostmi současné elektroniky. Další možný přístup, jak popsat vlastnosti nanomagnetů, je charakterizace ve frekvenční doméně v pásmu GHz. Nejrozšířenější technikou charakterizace ve frekvenční doméně je měření feromagnetické rezonance (FMR). Ze spekter FMR lze získat cenné informace o systému: parametr tlumení, saturační magnetizace atd. Metoda, kterou využíváme k detekci excitací spinových vln, má za cíl zjednodušení charakterizace. Využíváme termoelektrickou detekci spinových vln v magnetických drátech prostřednictvím anomálního Nernstova jevu. Metoda je založena na disipaci tepla uvnitř magnetické vrstvy v důsledku útlumu spinových vln, a proto dochází k vytvoření teplotního gradientu směrem k substrátu (kolmo k povrchu). To vede k vytvoření elektrického pole kolmého jak na teplotní gradient, tak na směr magnetizace. Napětí je obvykle v řádu V, proto může být měřeno obvyklým laboratorním vybavením. Navzdory své jednoduchosti poskytuje tato metoda velmi zajímavé výsledky a může být použita pro charakterizaci magnonických vlnovodů, magnonických metamateriálů, emitorů spinových vln a dalších zařízení, pracujících se spinovými vlnami.

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Schlitz, Richard. "Topological Transport Effects and Pure Spin Currents in Nanostructures." 2020. https://tud.qucosa.de/id/qucosa%3A71755.

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Magnetoresistive effects are powerful tools for studying the intricate structure of solid state electronic systems, and have many applications in our current information technology. In particular, the electronic system reflects the crystal symmetry and the orbital structure of the atoms of a given solid, and thus is crucial to understanding magnetism, superconductivity and many other effects which are of key interest to current solid state research. Consequently, studies of the electrical transport properties of solid state matter allow to evaluate this imprint and in turn draw conclusions about the interactions within a material. In this thesis, we will exploit the capabilities of magnetotransport measurements to infer the properties of a multitude of magnetic systems. In turn, this allows us to push the understanding of transport phenomena in magnetic materials. The first part of this work is focused on the magnetoresistance observed in spin Hall active metals in contact with a magnetic insulator. In such bilayers, the interfacial spin accumulation caused by the spin Hall effect in the metal can interact with the magnetic insulator, giving rise to interesting magnetoresistive effects. In the framework of this thesis, bilayers with several magnetic insulators are studied, including antiferomagnets, ferrimagnets and paramagnets (disordered magnets). For the disordered magnetic insulators, we find that the established spin Hall magnetoresistance framework does not allow to consistently describe the observed transport response. Consequently, we propose an alternative explanation of the magnetoresistance in such heterostructures, using the Hanle magnetoresistance and assuming an interface which has a finite electrical conductivity. This alternative model can serve to generalize the theory of the spin Hall magnetoresistance, providing addition information on the microscopic picture for the loss of the transverse spin component. Additionally, by partly removing the magnetic insulator and studying the ensuing changes, we verify that magnons are crucial for the observation of a non-local magnetoresistance in bilayers of a magnetic insulator and a metal. Finally, the local and non-local spin Seebeck effect (i.e. the electric field generated by a thermally driven pure spin current) is investigated in bilayers of Cr2O3 and Pt where the occurrence of a spin superfluid ground state was reported. In our sample, however, the transport response is consistent with the antiferromagnetic spin Seebeck effect mediated by the small magnetic field induced magnetization also reported for other antiferromagnet/metal heterostructures. As such, we cannot verify the presence of a spin superfluid ground state in the system. In the second part of this thesis, the topological properties of the electronic system and the related changes of the magnetoelectric and magnetothermal transport response are investigated. To that end, we first demonstrate a novel measurement technique, the alternating thermal gradient technique, allowing to separate the relevant thermovoltages from spurious other voltages generated within the measurement setup. We employ this novel technique for measuring the topological Nernst effect in Mn 1.8 PtSn and show the possibility to combine the magnetoelectric and magnetothermal transport response to evaluate the presence of topological transport signatures without requiring magnetization measurements. Additionally, we show that the anomalous Nernst effect in the non-collinear antiferromagnet Mn3Sn is connected to the antiferromagnetic domain structure: Using spatially resolved measurements of the anomalous Nernst effect, direct access to the antiferromagnetic domain structure is demonstrated. Additionally, a thermally assisted domain writing scheme is implemented, allowing the preparation of Mn3Sn into a defined antiferromagnetic domain state.

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Hsieh, Cheng-Han, and 謝政翰. "Ab initio Studies of Spin Nernst and Hall Effects in Metallic Group VB and VIB Transition Metal Dichalcogenides Bulks and Monolayers." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/5n67d8.

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碩士
國立臺灣大學
物理學研究所
105
Recently, the two dimensional materials, such as graphene, have attracted enormous attention due to their potential applications in information technologies and the intriguing underlying physics. In this thesis, we perform a comprehensive first-principles study of spin Nernst conductivity (SNC) and spin Hall conductivity (SHC) within the Berry phase formalism based on relativistic band structure calculations for 2H-MX2 (M ＝ Nb, Ta; X ＝ Te, Se) and 1T’-MX2 (M ＝ Mo, W; X ＝ Te) bulks and monolayers. This is a vital step for spintronics that the SHE and SNE enable us to create and control spin current without magnetic field or magnetic materials. For monolayer 2H- and 1T’-MX2, they are expected to show large spin Hall conductivity for the following reasons: (i) the inversion symmetry is broken explicitly; and (ii) the spin-orbit coupling (SOC) is substantial due to the presence of heavy metal atoms. However, our computational results show that the SHC of monolayer 2H-MX2 is smaller than that of the corresponding bulk materials. In 1T’ structure, the SHC of bulks and monolayers is of the same order of magnitude, while monolayer MoTe2 shows the larger SHC compared to that of bulk. In general, bulk 2H-TaSe2 and monolayer 1T’-WTe2 show the largest SHC and SNC among our calculations. The SNC of monolayer 1T’-WTe2 is larger than that of the others by one to two orders of magnitude. Therefore, we demonstrate that the transition metal dichalcogenides (TMDCs) bulks and monolayers are truly an ideal platform for spintronics including their application purposes.

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Book chapters on the topic "Spin Nernst effect"

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Hess, Christian. "Nernst Effect of Iron Pnictide and Cuprate Superconductors: Signatures of Spin Density Wave and Stripe Order." In NATO Science for Peace and Security Series B: Physics and Biophysics, 169–86. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4984-9_11.

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Kübler, Jürgen. "Electronic Structure and Magnetism." In Theory of Itinerant Electron Magnetism, 2nd Edition, 173–384. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780192895639.003.0004.

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The fundamental magnetic properties of iron, cobalt, and nickel are the center of interest, beginning with historical attempts and Stoner’s theory. Stoner susceptibility is derived in a modern way by Janak finding that only those three carry a magnetic moment in elementary metals. The energy-band structures of all transition elements are connected with their repective phase stability which is obtained by means of density-functional calculations. The band structure of the ferromagnetic metals is obtained and compared with angle-resolved photoemission data. The electronic structure of the antiferromagnetic metals, Cr, Mn, and fcc Fe is clarified. Next, the magnetic moments of transition-metal compounds are classified by means of the Slater–Pauling curve and a large number of compounds are half-metallic supplying spin-polarized transport. Multilayers realize oscillatory exchange and show unusual electronic properties such as giant magnetoresistance which is discussed in detail. Tunnel junctions supply spin valves. Relativistic effects in solids are of importance for magnetocrystalline anisotropy and spectroscopic effects. Kubo theory supplies the basic understanding of the magneto-optical Kerr effect for which a number of examples are given. Noncollinear magnetic order reveals novel interaction mechanisms, such as the Dzyaloshinsky–Moriya interaction. The Berry phase explains the anomalous Hall effect as well as the Nernst effect and leads to the field of topology in the solid state. Weyl fermions are also explored.

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Conference papers on the topic "Spin Nernst effect"

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Chen, Yi-Jia, and Ssu Yen Huang. "The Contribution of Thermal Hall Effect in Anomalous Nernst and Spin Seebeck Effects." In 2016 International Conference of Asian Union of Magnetics Societies (ICAUMS). IEEE, 2016. http://dx.doi.org/10.1109/icaums.2016.8479931.

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Chen, Y., and S. Huang. "Absence of the thermal Hall effect in anomalous Nernst and spin Seebeck effects." In 2017 IEEE International Magnetics Conference (INTERMAG). IEEE, 2017. http://dx.doi.org/10.1109/intmag.2017.8007552.

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Ono, T., S. Hirata, Y. Amemiya, T. Tabei, and S. Yokoyama. "Anomalous Nernst Effect of Ni-Al Alloys and Application to Spin Seebeck Devices." In 2017 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2017. http://dx.doi.org/10.7567/ssdm.2017.ps-12-12.

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Uematsu, G., T. Nomura, S. Hu, M. Hidegara, and T. Kimura. "Enhancement of thermal spin signal and suppression of anomalous Nernst effect in the CoFeAl/Cu/CoFeAl lateral spin valve." In 2015 IEEE International Magnetics Conference (INTERMAG). IEEE, 2015. http://dx.doi.org/10.1109/intmag.2015.7157183.

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Sengupta, Parijat, and Junxia Shi. "Anomalous Nernst and spin Nernst effects and thermo-spin Hall conductivity in Rashba-coupled materials (Conference Presentation)." In Spintronics XI, edited by Henri Jaffrès, Henri-Jean Drouhin, Jean-Eric Wegrowe, and Manijeh Razeghi. SPIE, 2018. http://dx.doi.org/10.1117/12.2320897.

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