Effects of Interfacial Oxidization on Magnetic Damping and Spin-Orbit Torques

被引：9

作者：

Lee, DongJoon ^{[1
,2
]}

Jeong, WonMin ^{[2
]}

Yun, DeokHyun ^{[2
,3
]}

Park, Seung-Young ^{[4
]}

Ju, Byeong-Kwon ^{[3
]}

Lee, Kyung-Jin ^{[5
]}

Min, Byoung-Chul ^{[2
,6
]}

Koo, Hyun Cheol ^{[1
,2
]}

Lee, OukJae ^{[2
]}

机构：

[1] Korea Univ, KU KIST Grad Sch Converging Sci & Technol, Seoul 02841, South Korea

[2] Korea Inst Sci & Technol, Ctr Spintron, Seoul 02792, South Korea

[3] Korea Univ, Dept Elect Engn, Seoul 02841, South Korea

[4] Korea Basic Sci Inst, Spin Engn Phys Team, Daejeon 34133, South Korea

[5] Korea Adv Inst Sci & Technol, Dept Phys, Daejeon 34141, South Korea

[6] Korea Univ Sci & Technol, KIST Sch, Div Nano & Informat Technol, Seoul 02792, South Korea

来源：

ACS APPLIED MATERIALS & INTERFACES | 2021年 / 13卷 / 16期

基金：

新加坡国家研究基金会;

关键词：

spintronics; spin-orbit torque; spin-Hall effect; Gilbert damping; interfacial magnetic oxide; magnetic resonance;

D O I：

10.1021/acsami.1c00608

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We investigate the effects of interfacial oxidation on the perpendicular magnetic anisotropy, magnetic damping, and spin-orbit torques in heavy-metal (Pt)/ferromagnet (Co or NiFe)/capping (MgO/Ta, HfOx, or TaN) structures. At room temperature, the capping materials influence the effective surface magnetic anisotropy energy density, which is associated with the formation of interfacial magnetic oxides. The magnetic damping parameter of Co is considerably influenced by the capping material (especially MgO) while that of NiFe is not. This is possibly due to extra magnetic damping via spin-pumping process across the Co/CoO interface and incoherent magnon generation (spin fluctuation) developed in the antiferromagnetic CoO. It is also observed that both antidamping and field-like spin-orbit torque efficiencies vary with the capping material in the thickness ranges we examined. Our results reveal the crucial role of interfacial oxides on the perpendicular magnetic anisotropy, magnetic damping, and spin-orbit torques.

引用

页码：19414 / 19421

页数：8

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