DataVXACS Applied Materials & InterfacesPaper
journal article·2021-04-28

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

DongJoon Lee, WonMin Jeong, DeokHyun Yun, Seung-Young Park, Byeong-Kwon Ju, Kyung-Jin Lee, Byoung-Chul Min, Hyun Cheol Koo, OukJae Lee

ACS Applied Materials & Interfaces· Volume 13· Issue 16
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Source abstract

Abstract

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.
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Research context

OpenAlex topics: Magnetic properties of thin films · ZnO doping and properties · Magnetic and transport properties of perovskites and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea

Center for Spintronics, Korea Institute of Science and Technology, Seoul 02792, Korea

Department of Electrical Engineering, Korea University, Seoul 02841, Korea

Spin Engineering Physics Team, Korea Basic Science Institute, Daejeon 34133, Korea

Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea

Division of Nano and Information Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Korea

Funding

National Research Council of Science and Technology · Ministry of Science and ICT, South Korea · National Research Foundation of Korea · Korea Institute of Science and Technology

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