Spin-orbit torques and magnetization switching in W/Co2FeAl/MgO structures

被引：32

作者：

Gabor, M. S. ^{[1
]}

Petrisor, T., Jr. ^{[1
]}

Mos, R. B. ^{[1
]}

Mesaros, A. ^{[1
]}

Nasui, M. ^{[1
]}

Belmeguenai, M. ^{[2
]}

Zighem, F. ^{[2
]}

Tiusan, C. ^{[1
,3
]}

机构：

[1] Tech Univ Cluj Napoca, Dept Chem & Phys, Ctr Superconduct Spintron & Surface Sci, Str Memorandumului, Cluj Napoca 400114, Romania

[2] Univ Paris 13, Sorbonne Paris Cite, LSPM CNRS UPR 3407, 99 Ave Jean Baptiste Clement, F-93430 Villetaneuse, France

[3] Univ Lorraine, CNRS, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, France

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2016年 / 49卷 / 36期

关键词：

Heusler alloys; spin orbit torques; perpendicular magnetic anisotropy; W/COFEB/MGO STRUCTURES; DOMAIN-WALLS; DRIVEN; LAYER;

D O I：

10.1088/0022-3727/49/36/365003

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnetization switching by current induced spin-orbit torques (SOTs) in heavy metal/ ferromagnetic metal/oxide structures is of great research interest due to its potential applications in the field of low power consumption spintronic devices. Here, we study the Slonczewski-like and the field-like SOT effective fields in beta-W/Co2FeAl/MgO structures showing perpendicular magnetic anisotropy (PMA). We characterize the SOT effective fields using harmonic Hall voltage measurements and we point out the essential role of the planar Hall effect corrections. We estimate that for bulk beta-W an effective spin Hall angle as large as 0.3 +/- 0.03 and a spin diffusion length of 2.2 +/- 0.3 nm. Moreover, we demonstrate SOT-induced magnetization switching for charge current densities of the order of 10(6) A cm(-2).

引用

页数：7

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