Fe-Intercalation Dominated Ferromagnetism of van der Waals Fe3GeTe2

被引：15

作者：

Wu, Yueshen ^{[1
]}

Hu, Yuxiong ^{[1
]}

Wang, Cong ^{[2
,3
]}

Zhou, Xiang ^{[1
,4
]}

Hou, Xiaofei ^{[1
,4
]}

Xia, Wei ^{[1
,4
]}

Zhang, Yiwen ^{[1
,4
]}

Wang, Jinghui ^{[1
,4
]}

Ding, Yifan ^{[1
,4
]}

He, Jiadian ^{[1
,4
]}

Dong, Peng ^{[1
,4
]}

Bao, Song ^{[5
,6
]}

Wen, Jinsheng ^{[5
,6
]}

Guo, Yanfeng ^{[1
,4
]}

Watanabe, Kenji ^{[7
]}

Taniguchi, Takashi ^{[8
]}

Ji, Wei ^{[2
]}

Wang, Zhu-Jun ^{[1
]}

Li, Jun ^{[1
,9
,10
]}

机构：

[1] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

[2] Renmin Univ China, Dept Phys, Beijing Key Lab Optoelect Funct Mat & Micronano De, Beijing 100872, Peoples R China

[3] Renmin Univ China, Key Lab Quantum State Construction & Manipulat, Minist Educ, Beijing 100872, Peoples R China

[4] ShanghaiTech Univ, ShanghaiTech Lab Topol Phys, Shanghai 200031, Peoples R China

[5] Nanjing Univ, Sch Phys, Nanjing 210093, Peoples R China

[6] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China

[7] Natl Inst Mat Sci, Res Ctr Funct Mat, 1-1 Namiki, Tsukuba 3050044, Japan

[8] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton, 1-1 Namiki, Tsukuba 3050044, Japan

[9] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, 865 Changning Rd, Shanghai 200050, Peoples R China

[10] Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China

来源：

ADVANCED MATERIALS | 2023年 / 35卷 / 36期

基金：

中国国家自然科学基金; 上海市自然科学基金; 中国博士后科学基金;

关键词：

2D materials; exchange bias; ferromagnetism; 2D MATERIALS;

D O I：

10.1002/adma.202302568

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Fe3GeTe2 have proven to be of greatly intrigue. However, the underlying mechanism behind the varying Curie temperature (T-c) values remains a puzzle. This study explores the atomic structure of Fe3GeTe2 crystals exhibiting T-c values of 160, 210, and 230 K. The elemental mapping reveals a Fe-intercalation on the interstitial sites within the van der Waals gap of the high-T-c (210 and 230 K) samples, which are observed to have an exchange bias effect by electrical transport measurements, while Fe intercalation or the bias effect is absent in the low-T-c (160 K) samples. First-principles calculations further suggest that the Fe-intercalation layer may be responsible for the local antiferromagnetic coupling that gives rise to the exchange bias effect, and that the interlayer exchange paths greatly contribute to the enhancement of T-c. This discovery of the Fe-intercalation layer elucidates the mechanism behind the hidden antiferromagnetic ordering that underlies the enhancement of T-c in Fe3GeTe2.

引用

页数：9

共 44 条

[41] Emergence of Kondo lattice behavior in a van der Waals itinerant ferromagnet, Fe3GeTe2
Zhang, Yun
Lu, Haiyan
Zhu, Xiegang
Tan, Shiyong
Feng, Wei
Liu, Qin
Zhang, Wen
Chen, Qiuyun
Liu, Yi
Luo, Xuebing
Xie, Donghua
Luo, Lizhu
Zhang, Zhengjun
Lai, Xinchun
[J]. SCIENCE ADVANCES, 2018, 4 (01):
[42] Gate-Tuned Interlayer Coupling in van der Waals Ferromagnet Fe3GeTe2 Nanoflakes
Zheng, Guolin
Xie, Wen-Qiang
Albarakati, Sultan
Algarni, Meri
Tan, Cheng
Wang, Yihao
Peng, Jingyang
Partridge, James
Farrar, Lawrence
Yi, Jiabao
Xiong, Yimin
Tian, Mingliang
Zhao, Yu-Jun
Wang, Lan
[J]. PHYSICAL REVIEW LETTERS, 2020, 125 (04)
[43] Exchange Bias in van der Waals CrCl3/Fe3GeTe2 Heterostructures
Zhu, Rui
Zhang, Wen
Shen, Wei
Wong, Ping Kwan Johnny
Wang, Qixing
Liang, Qijie
Tian, Zhen
Zhai, Ya
Qiu, Cheng-wei
Wee, Andrew T. S.
[J]. NANO LETTERS, 2020, 20 (07) : 5030 - 5035
[44] Strong anisotropy and magnetostriction in the two-dimensional Stoner ferromagnet Fe3GeTe2
Zhuang, Houlong L.
Kent, P. R. C.
Hennig, Richard G.
[J]. PHYSICAL REVIEW B, 2016, 93 (13)

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