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
收藏
页数：7
相关论文
共 53 条
[1]  
Arais A. A., 2016, INT J SCI ENG RES, V7, P10
[2]   MAGNETOOPTICAL AND MAGNETIC-PROPERTIES OF RE-TM/PT MULTILAYER FILMS [J].
AWANO, H ;
NIIHARA, T ;
OJIMA, M .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1993, 126 (1-3) :550-552
[3]   Enhanced field-free current-induced magnetization switching by interlayer exchange coupling with insulating spacer layer [J].
Bekele, Zelalem Abebe ;
Lan, Xiukai ;
Meng, Kangkang ;
Liu, Xionghua .
JOURNAL OF APPLIED PHYSICS, 2020, 127 (11)
[4]   Modulated spin orbit torque in ultrathin ferromagnetic layer with different capping layers [J].
Bekele, Zelalem Abebe ;
Meng, Kangkang ;
Miao, Jun ;
Xu, Xiaoguang ;
Jiang, Yong .
SURFACE & COATINGS TECHNOLOGY, 2019, 359 :354-359
[5]   The dominancy of damping like torque for the current induced magnetization switching in Pt/Co/W multilayers [J].
Bekele, Zelalem Abebe ;
Meng, Kangkang ;
Miao, Jun ;
Xu, Xiaoguang ;
Jiang, Yong .
SOLID STATE COMMUNICATIONS, 2018, 274 :41-45
[6]   Ultrafast and energy-efficient spin-orbit torque switching in compensated ferrimagnets [J].
Cai, Kaiming ;
Zhu, Zhifeng ;
Lee, Jong Min ;
Mishra, Rahul ;
Ren, Lizhu ;
Pollard, Shawn D. ;
He, Pan ;
Liang, Gengchiau ;
Teo, Kie Leong ;
Yang, Hyunsoo .
NATURE ELECTRONICS, 2020, 3 (01) :37-42
[7]  
Cai KM, 2017, NAT MATER, V16, P712, DOI [10.1038/nmat4886, 10.1038/NMAT4886]
[8]   Tuning a Binary Ferromagnet into a Multistate Synapse with Spin-Orbit-Torque-Induced Plasticity [J].
Cao, Yi ;
Rushforth, Andrew W. ;
Sheng, Yu ;
Zheng, Houzhi ;
Wang, Kaiyou .
ADVANCED FUNCTIONAL MATERIALS, 2019, 29 (25)
[9]  
Collette R., 2015, DETERMINING SPIN HAL, P156
[10]   Field-Free Spin-Orbit Torque Switching of Perpendicular Magnetization by the Rashba Interface [J].
Cui, Baoshan ;
Wu, Hao ;
Li, Dong ;
Razavi, Seyed Armin ;
Wu, Di ;
Wong, Kin L. ;
Chang, Meixia ;
Gao, Meizhen ;
Zuo, Yalu ;
Xi, Li ;
Wang, Kang L. .
ACS APPLIED MATERIALS & INTERFACES, 2019, 11 (42) :39369-39375
123456