Composition dependence of spin-orbit torque in Pt1-xMnx/CoFeB heterostructures

被引：0

作者：

Vihanga De Zoysa, K. ^{[1
]}

Duttagupta, Samik ^{[1
,2
,3
]}

Itoh, Ryuichi ^{[1
]}

Takeuchi, Yutaro ^{[1
]}

Ohno, Hideo ^{[1
,2
,3
,4
,5
]}

Fukami, Shunsuke ^{[1
,2
,3
,4
,5
]}

机构：

[1] Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai,980-8577, Japan

[2] Center for Science and Innovation in Spintronics, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai,980-8577, Japan

[3] Center for Spintronics Research Network, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai,980-8577, Japan

[4] Center for Innovative Integrated Electronic Systems, Tohoku University, 468-1 Aramaki Aza Aoba, Aoba-ku, Sendai,980-0845, Japan

[5] WPI-Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai,980-8577, Japan

来源：

Applied Physics Letters | 2020年 / 117卷 / 01期

基金：

日本学术振兴会;

关键词：

Platinum alloys - Iron alloys - Manganese alloys - Binary alloys;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We investigate spin-orbit torques (SOTs) in heterostructures with Pt1-xMnx alloy and CoFeB as a function of Mn composition (x) by using an extended harmonic Hall measurement. Slonczewski-like and field-like SOT efficiencies (ζ SL and ζ FL) show non-monotonic variation and a different trend with respect to x, and considerably large ζ SL up to 0.21 is obtained at x = 0.20. Compared to the x dependence of longitudinal resistivity, the Slonczewski-like SOT in the low x region is mainly attributed to an intrinsic spin-Hall mechanism, whereas a non-monotonic variation in the higher x region suggests the presence of additional factors. The present findings deliver useful clues to understand the physics behind SOT generation in antiferromagnetic heterostructures and offer a route to realize efficient devices. © 2020 Author(s).

引用

共 50 条

[1] Composition dependence of spin-orbit torque in Pt1-xMnx/CoFeB heterostructures
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[2] Enhanced spin-orbit torque via interface engineering in Pt/CoFeB/MgO heterostructures
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