Anisotropic magnetocaloric effect in Fe3−x GeTe2

Abstract We present a comprehensive study on anisotropic magnetocaloric porperties of the van der Waals weak-itinerant ferromagnet Fe3−x GeTe2 that features gate-tunable room-temperature ferromagnetism in few-layer device. Intrinsic magnetocrystalline anisotropy is observed to be temperature-depende...

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Autores principales:	Yu Liu, Jun Li, Jing Tao, Yimei Zhu, Cedomir Petrovic
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0fd4ca7b33184ecab4653e3f6a2dd9b6
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spelling	oai:doaj.org-article:0fd4ca7b33184ecab4653e3f6a2dd9b62021-12-02T15:08:32ZAnisotropic magnetocaloric effect in Fe3−x GeTe210.1038/s41598-019-49654-42045-2322https://doaj.org/article/0fd4ca7b33184ecab4653e3f6a2dd9b62019-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-49654-4https://doaj.org/toc/2045-2322Abstract We present a comprehensive study on anisotropic magnetocaloric porperties of the van der Waals weak-itinerant ferromagnet Fe3−x GeTe2 that features gate-tunable room-temperature ferromagnetism in few-layer device. Intrinsic magnetocrystalline anisotropy is observed to be temperature-dependent and most likely favors the long-range magnetic order in thin Fe3−x GeTe2 crsytal. The magnetic entropy change ΔS M also reveals an anisotropic characteristic between H//ab and H//c, which could be well scaled into a universal curve. The peak value $$-\Delta {S}_{M}^{{\max }}$$ −ΔSMmax of 1.20 J kg−1 K−1 and the corresponding adiabatic temperature change ΔT ad of 0.66 K are deduced from heat capacity with out-of-plane field change of 5 T. By fitting of the field-dependent parameters of $$-\Delta {S}_{M}^{{\max }}$$ −ΔSMmax and the relative cooling power RCP, it gives $$-{\rm{\triangle }}{S}_{M}^{{\max }}$$ −∆SMmax ∝ H n with n = 0.603(6) and RCP ∝ H m with m = 1.20(1) when H//c. Given the high and tunable T c , Fe3−x GeTe2 crystals are of interest for fabricating the heterostructure-based spintronics device.Yu LiuJun LiJing TaoYimei ZhuCedomir PetrovicNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-8 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yu Liu Jun Li Jing Tao Yimei Zhu Cedomir Petrovic Anisotropic magnetocaloric effect in Fe3−x GeTe2
description	Abstract We present a comprehensive study on anisotropic magnetocaloric porperties of the van der Waals weak-itinerant ferromagnet Fe3−x GeTe2 that features gate-tunable room-temperature ferromagnetism in few-layer device. Intrinsic magnetocrystalline anisotropy is observed to be temperature-dependent and most likely favors the long-range magnetic order in thin Fe3−x GeTe2 crsytal. The magnetic entropy change ΔS M also reveals an anisotropic characteristic between H//ab and H//c, which could be well scaled into a universal curve. The peak value $$-\Delta {S}_{M}^{{\max }}$$ −ΔSMmax of 1.20 J kg−1 K−1 and the corresponding adiabatic temperature change ΔT ad of 0.66 K are deduced from heat capacity with out-of-plane field change of 5 T. By fitting of the field-dependent parameters of $$-\Delta {S}_{M}^{{\max }}$$ −ΔSMmax and the relative cooling power RCP, it gives $$-{\rm{\triangle }}{S}_{M}^{{\max }}$$ −∆SMmax ∝ H n with n = 0.603(6) and RCP ∝ H m with m = 1.20(1) when H//c. Given the high and tunable T c , Fe3−x GeTe2 crystals are of interest for fabricating the heterostructure-based spintronics device.
format	article
author	Yu Liu Jun Li Jing Tao Yimei Zhu Cedomir Petrovic
author_facet	Yu Liu Jun Li Jing Tao Yimei Zhu Cedomir Petrovic
author_sort	Yu Liu
title	Anisotropic magnetocaloric effect in Fe3−x GeTe2
title_short	Anisotropic magnetocaloric effect in Fe3−x GeTe2
title_full	Anisotropic magnetocaloric effect in Fe3−x GeTe2
title_fullStr	Anisotropic magnetocaloric effect in Fe3−x GeTe2
title_full_unstemmed	Anisotropic magnetocaloric effect in Fe3−x GeTe2
title_sort	anisotropic magnetocaloric effect in fe3−x gete2
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/0fd4ca7b33184ecab4653e3f6a2dd9b6
work_keys_str_mv	AT yuliu anisotropicmagnetocaloriceffectinfe3xgete2 AT junli anisotropicmagnetocaloriceffectinfe3xgete2 AT jingtao anisotropicmagnetocaloriceffectinfe3xgete2 AT yimeizhu anisotropicmagnetocaloriceffectinfe3xgete2 AT cedomirpetrovic anisotropicmagnetocaloriceffectinfe3xgete2
_version_	1718388042703568896

Anisotropic magnetocaloric effect in Fe3−x GeTe2

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