Hard magnetic properties in nanoflake van der Waals Fe3GeTe2

被引：369

作者：

Tan, Cheng ^{[1
]}

Lee, Jinhwan ^{[2
]}

Jung, Soon-Gil ^{[3
,4
]}

Park, Tuson ^{[3
,4
]}

Albarakati, Sultan ^{[1
]}

Partridge, James ^{[1
]}

Field, Matthew R. ^{[1
]}

McCulloch, Dougal G. ^{[1
]}

Wang, Lan ^{[1
]}

Lee, Changgu ^{[5
,6
]}

机构：

[1] RMIT Univ, Sch Sci, Melbourne, Vic 3001, Australia

[2] Sungkyunkwan Univ, Sch Mech Engn, Suwon 440746, South Korea

[3] Sungkyunkwan Univ, CQMS, Suwon 440746, South Korea

[4] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea

[5] Sungkyunkwan Univ, Sch Mech Engn, Suwon 440746, South Korea

[6] Sungkyunkwan Univ, SKKU Adv Inst Nanotechnol SAINT, Suwon 440746, South Korea

来源：

NATURE COMMUNICATIONS | 2018年 / 9卷

基金：

澳大利亚研究理事会; 新加坡国家研究基金会;

关键词：

SPIN-ORBIT TORQUES; FERROMAGNETISM; TRANSITION; CRYSTAL; FILMS; SYMMETRY; RANGE; PHASE;

D O I：

10.1038/s41467-018-04018-w

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Two-dimensional van der Waals materials have demonstrated fascinating optical and electrical characteristics. However, reports on magnetic properties and spintronic applications of van der Waals materials are scarce by comparison. Here, we report anomalous Hall effect measurements on single crystalline metallic Fe3GeTe2 nanoflakes with different thicknesses. These nanoflakes exhibit a single hard magnetic phase with a near square-shaped magnetic loop, large coercivity (up to 550 mT at 2 K), a Curie temperature near 200 K and strong perpendicular magnetic anisotropy. Using criticality analysis, the coupling length between van der Waals atomic layers in Fe3GeTe2 is estimated to be similar to 5 van der Waals layers. Furthermore, the hard magnetic behaviour of Fe3GeTe2 can be well described by a proposed model. The magnetic properties of Fe3GeTe2 highlight its potential for integration into van der Waals magnetic heterostructures, paving the way for spintronic research and applications based on these devices.

引用

页数：7

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