Modulating Curie Temperature and Magnetic Anisotropy in Nanoscale-Layered Cr2Te3 Films: Implications for Room-Temperature Spintronics

被引：33

作者：

Lee, In Hak ^{[1
,2
]}

Choi, Byoung Ki ^{[1
]}

Kim, Hyuk Jin ^{[1
]}

Kim, Min Jay ^{[1
,3
]}

Jeong, Hu Young ^{[4
]}

Lee, Jong Hoon ^{[4
]}

Park, Seung-Young ^{[5
]}

Jo, Younghun ^{[5
]}

Lee, Chanki ^{[2
]}

Choi, Jun Woo ^{[2
]}

Cho, Seong Won ^{[6
]}

Lee, Suyoun ^{[6
]}

Kim, Younghak ^{[7
]}

Kim, Beom Hyun ^{[8
]}

Lee, Kyeong Jun ^{[9
]}

Heo, Jin Eun ^{[9
]}

Chang, Seo Hyoung ^{[9
]}

Li, Fengping ^{[1
]}

Chittari, Bheema Lingam ^{[10
]}

Jung, Jeil ^{[1
,3
]}

Chang, Young Jun ^{[1
,3
]}

机构：

[1] Univ Seoul, Dept Phys, Seoul 02504, South Korea

[2] Korea Inst Sci & Technol, Ctr Spintron, Seoul 02792, South Korea

[3] Univ Seoul, Dept Smart Cities, Seoul 02504, South Korea

[4] UNIST, UNIST Cent Res Facil UCRF, Ulsan 44919, South Korea

[5] Korea Basic Sci Inst, Ctr Sci Instrumentat, Daejeon 34133, South Korea

[6] Korea Inst Sci & Technol, Ctr Neuromorph Engn, Seoul 02792, South Korea

[7] POSTECH, Pohang Accelerator Lab, Pohang 37673, South Korea

[8] Korea Inst Adv Study, Seoul 02455, South Korea

[9] Chung Ang Univ, Dept Phys, Seoul 06974, South Korea

[10] Indian Inst Sci Educ & Res IISER Kolkata, Dept Phys Sci, Mohanpur 741246, W Bengal, India

来源：

ACS APPLIED NANO MATERIALS | 2021年 / 4卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

nanoscale-layered-ferromagnets; room-temperature ferromagnetism; magnetic anisotropy; two-dimensional materials; spintronic applications; FERROMAGNETISM; DISCOVERY;

D O I：

10.1021/acsanm.1c00391

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanoscale-layered ferromagnets have demonstrated fascinating two-dimensional magnetism down to atomic layers, providing a peculiar playground of spin orders for investigating fundamental physics and spintronic applications. However, the strategy for growing films with designed magnetic properties is not well established yet. Herein, we present a versatile method to control the Curie temperature (T-C) and magnetic anisotropy during the growth of ultrathin Cr2Te3 films. We demonstrate an increase of the TC from 165 to 310 K in sync with magnetic anisotropy switching from an out-of-plane orientation to an in-plane one, respectively, via controlling the Te source flux during film growth, leading to different c-lattice parameters while preserving the stoichiometries and thicknesses of the films. We attributed this modulation of magnetic anisotropy to the switching of the orbital magnetic moment, using X-ray magnetic circular dichroism analysis. We also inferred that different c-lattice constants might be responsible for the magnetic anisotropy change, supported by theoretical calculations. These findings emphasize the potential of ultrathin Cr2Te3 films as candidates for developing room-temperature spintronics applications, and similar growth strategies could be applicable to fabricate other nanoscale layered magnetic compounds.

引用

页码：4810 / 4819

页数：10

共 66 条

[1] MAGNETIC STRUCTURE OF CR2TE3, CR3TE4, AND CR5TE6 [J].

ANDRESEN, AF .

ACTA CHEMICA SCANDINAVICA, 1970, 24 (10) :3495-&

[2] Nanosecond-Timescale Low Energy Switching of In-Plane Magnetic Tunnel Junctions through Dynamic Oersted-Field-Assisted Spin Hall Effect [J].

Aradhya, S. V. ;

Rowlands, G. E. ;

Oh, J. ;

Ralph, D. C. ;

Buhrman, R. A. .

NANO LETTERS, 2016, 16 (10) :5987-5992

[3] Covalent 2D Cr2Te3 ferromagnet [J].

Bian, Mengying ;

Kamenskii, Aleksandr N. ;

Han, Mengjiao ;

Li, Wenjie ;

Wei, Sichen ;

Tian, Xuezeng ;

Eason, David B. ;

Sun, Fan ;

He, Keke ;

Hui, Haolei ;

Yao, Fei ;

Sabirianov, Renat ;

Bird, Jonathan P. ;

Yang, Chunlei ;

Miao, Jianwei ;

Lin, Junhao ;

Crooker, Scott A. ;

Hou, Yanglong ;

Zeng, Hao .

MATERIALS RESEARCH LETTERS, 2021, 9 (05) :205-212

[4] Cr2Te3 Thin Films for Integration in Magnetic Topological Insulator Heterostructures [J].

Burn, D. M. ;

Duffy, L. B. ;

Fujita, R. ;

Zhang, S. L. ;

Figueroa, A. I. ;

Herrero-Martin, J. ;

van der Laan, G. ;

Hesjedal, T. .

SCIENTIFIC REPORTS, 2019, 9 (1)

[5] Discovery of robust in-plane ferroelectricity in atomic-thick SnTe [J].

Chang, Kai ;

Liu, Junwei ;

Lin, Haicheng ;

Wang, Na ;

Zhao, Kun ;

Zhang, Anmin ;

Jin, Feng ;

Zhong, Yong ;

Hu, Xiaopeng ;

Duan, Wenhui ;

Zhang, Qingming ;

Fu, Liang ;

Xue, Qi-Kun ;

Chen, Xi ;

Ji, Shuai-Hua .

SCIENCE, 2016, 353 (6296) :274-278

[6] EXPERIMENTAL CONFIRMATION OF THE X-RAY MAGNETIC CIRCULAR-DICHROISM SUM-RULES FOR IRON AND COBALT [J].

CHEN, CT ;

IDZERDA, YU ;

LIN, HJ ;

SMITH, NV ;

MEIGS, G ;

CHABAN, E ;

HO, GH ;

PELLEGRIN, E ;

SETTE, F .

PHYSICAL REVIEW LETTERS, 1995, 75 (01) :152-155

[7] Evidence for Magnetic Skyrmions at the Interface of Ferromagnet/Topological-Insulator Heterostructures [J].

Chen, Junshu ;

Wang, Linjing ;

Zhang, Meng ;

Zhou, Liang ;

Zhang, Runnan ;

Jin, Lipeng ;

Wang, Xuesen ;

Qin, Hailang ;

Qiu, Yang ;

Mei, Jiawei ;

Ye, Fei ;

Xi, Bin ;

He, Hongtao ;

Li, Bin ;

Wang, Gan .

NANO LETTERS, 2019, 19 (09) :6144-6151

[8] Strong correlations and orbital texture in single-layer 1T-TaSe2 [J].

Chen, Yi ;

Ruan, Wei ;

Wu, Meng ;

Tang, Shujie ;

Ryu, Hyejin ;

Tsai, Hsin-Zon ;

Lee, Ryan ;

Kahn, Salman ;

Liou, Franklin ;

Jia, Caihong ;

Albertini, Oliver R. ;

Xiong, Hongyu ;

Jia, Tao ;

Liu, Zhi ;

Sobota, Jonathan A. ;

Liu, Amy Y. ;

Moore, Joel E. ;

Shen, Zhi-Xun ;

Louie, Steven G. ;

Mo, Sung-Kwan ;

Crommie, Michael F. .

NATURE PHYSICS, 2020, 16 (02) :218-+

[9]

Chhowalla M, 2013, NAT CHEM, V5, P263, DOI [10.1038/NCHEM.1589, 10.1038/nchem.1589]

[10] Near Degeneracy of Magnetic Phases in Two-Dimensional Chromium Telluride with Enhanced Perpendicular Magnetic Anisotropy [J].

Coughlin, Amanda L. ;

Xie, Dongyue ;

Yao, Yue ;

Zhan, Xun ;

Chen, Qiang ;

Hewa-Walpitage, Heshan ;

Zhang, Xiaohang ;

Guo, Hua ;

Zhou, Haidong ;

Lou, Jun ;

Wang, Jian ;

Li, Yan S. ;

Fertig, Herbert A. ;

Zhang, Shixiong .

ACS NANO, 2020, 14 (11) :15256-15266

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