High-Efficiency Spin-Orbit Torque Switching Using a Single Heavy-Metal Alloy with Opposite Spin Hall Angles

被引：39

作者：

Bekele, Zelalem Abebe ^{[1
]}

Liu, Xionghua ^{[1
,2
]}

Cao, Yi ^{[1
,3
]}

Wang, Kaiyou ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

[3] Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China

来源：

ADVANCED ELECTRONIC MATERIALS | 2021年 / 7卷 / 01期

基金：

北京市自然科学基金; 中国国家自然科学基金;

关键词：

alloy composition; competing spins; spin Hall angles; spin Hall effect; spin– orbit torque; PERPENDICULAR MAGNETIZATION; FERROMAGNETIC LAYER;

D O I：

10.1002/aelm.202000793

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Spin-orbit torque (SOT) induced perpendicular magnetization switching in Pt1-xGdx/Co/Al2O3 heterostructure with x = 0, 0.02, 0.14, 0.30, and 0.33 is investigated. With in-plane charge current flowing through the Pt1-xGdx layer, field-free current-induced magnetization switching is observed for all nonzero x due to the existence of opposite spin Hall angles (theta(SHA)) from Pt1-xGdx alloys. Furthermore, the large theta(SHA) of about 0.27 is obtained in the optimal Pt0.70Gd0.30 alloy films, which is about four times larger than that of the pure Pt. This work suggests a simple and scalable method for realizing field-free SOT switching, and provides potential candidates of spin Hall materials that can be used to produce highly efficient SOTs.

引用

页数：7

共 53 条

[31] Magnetic impurities in thin films and 2D Ising superconductors [J].

Mockli, David ;

Haim, Menashe ;

Khodas, Maxim .

JOURNAL OF APPLIED PHYSICS, 2020, 128 (05)

[32] Extrinsic Spin Hall Effect Induced by Iridium Impurities in Copper [J].

Niimi, Y. ;

Morota, M. ;

Wei, D. H. ;

Deranlot, C. ;

Basletic, M. ;

Hamzic, A. ;

Fert, A. ;

Otani, Y. .

PHYSICAL REVIEW LETTERS, 2011, 106 (12)

[33] Tuning Spin Hall Angles by Alloying [J].

Obstbaum, M. ;

Decker, M. ;

Greitner, A. K. ;

Haertinger, M. ;

Meier, T. N. G. ;

Kronseder, M. ;

Chadova, K. ;

Wimmer, S. ;

Koedderitzsch, D. ;

Ebert, H. ;

Back, C. H. .

PHYSICAL REVIEW LETTERS, 2016, 117 (16)

[34]

Oh YW, 2016, NAT NANOTECHNOL, V11, P878, DOI [10.1038/nnano.2016.109, 10.1038/NNANO.2016.109]

[35] Strong spin Hall effect in the antiferromagnet PtMn [J].

Ou, Yongxi ;

Shi, Shengjie ;

Ralph, D. C. ;

Buhrman, R. A. .

PHYSICAL REVIEW B, 2016, 93 (22)

[36] Origin of interfacial perpendicular magnetic anisotropy in MgO/CoFe/metallic capping layer structures [J].

Peng, Shouzhong ;

Wang, Mengxing ;

Yang, Hongxin ;

Zeng, Lang ;

Nan, Jiang ;

Zhou, Jiaqi ;

Zhang, Youguang ;

Hallal, Ali ;

Chshiev, Mairbek ;

Wang, Kang L. ;

Zhang, Qianfan ;

Zhao, Weisheng .

SCIENTIFIC REPORTS, 2015, 5

[37] Anisotropy measurements of FePt thin films [J].

Richter, H. J. ;

Hellwig, O. ;

Florez, S. ;

Brombacher, C. ;

Albrecht, M. .

JOURNAL OF APPLIED PHYSICS, 2011, 109 (07)

[38] KONDO-RESISTIVITY SUPPRESSION DUE TO INELASTIC SCATTERING OF CONDUCTION ELECTRONS BY MAGNETIC IMPURITIES IN ALLOYS [J].

RIESS, I ;

RON, A .

PHYSICAL REVIEW B, 1971, 4 (11) :4099-&

[39] Orbitally dominated Rashba-Edelstein effect in noncentrosymmetric antiferromagnets [J].

Salemi, Leandro ;

Berritta, Marco ;

Nandy, Ashis K. ;

Oppeneer, Peter M. .

NATURE COMMUNICATIONS, 2019, 10 (1)

[40] All-electric magnetization switching and Dzyaloshinskii-Moriya interaction in WTe2/ferromagnet heterostructures [J].

Shi, Shuyuan ;

Liang, Shiheng ;

Zhu, Zhifeng ;

Cai, Kaiming ;

Pollard, Shawn D. ;

Wang, Yi ;

Wang, Junyong ;

Wang, Qisheng ;

He, Pan ;

Yu, Jiawei ;

Eda, Goki ;

Liang, Gengchiau ;

Yang, Hyunsoo .

NATURE NANOTECHNOLOGY, 2019, 14 (10) :945-+

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