Large spin-orbit torques in Pt/Co-Ni/W heterostructures

被引：72
|
作者：
Yu, Jiawei [1 ]
Qiu, Xuepeng [1 ]
Legrand, William [1 ]
Yang, Hyunsoo [1 ]
机构：
[1] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore
来源：
APPLIED PHYSICS LETTERS | 2016年 / 109卷 / 04期
基金：
新加坡国家研究基金会;
关键词：
DRIVEN; DEPENDENCE; MAGNITUDE;
D O I：
10.1063/1.4959958
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The spin orbit torques (SOTs) in perpendicularly magnetized Co-Ni multilayers sandwiched between two heavy metals (HM) have been studied. By exploring various HM materials, we show an efficient enhancement or cancellation of the total SOT, depending on the combination of the two HM materials. The maximum SOT effective field is obtained in Pt/Co-Ni/W heterostructures. We also model our double HM system and show that the effective spin Hall angle has a peak value at certain HM thicknesses. Measuring the SOT in Pt/Co-Ni/W for various W thicknesses confirms an effective spin Hall angle up to 0.45 in our double HM system. Published by AIP Publishing.
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页数：5
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