文章基本信息

标题：Anisotropic magnetocaloric effect in Fe3−xGeTe2
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作者：Yu Liu ; Jun Li ; Jing Tao 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2019
卷号：9
期号：1
页码：1-8
DOI：10.1038/s41598-019-49654-4
出版社：Springer Nature
摘要：We present a comprehensive study on anisotropic magnetocaloric porperties of the van der Waals weak-itinerant ferromagnet Fe 3-x GeTe 2 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 Fe 3-x GeTe 2 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 [Formula: see text] 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 [Formula: see text] and the relative cooling power RCP, it gives [Formula: see text] ∝ 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 , Fe 3-x GeTe 2 crystals are of interest for fabricating the heterostructure-based spintronics device.