Tuning non-Gilbert-type damping in FeGa films on MgO(001) via oblique deposition

Yang Li; Yan Li; Qian Liu; Zhe Yuan; Qing Feng Zhan; Wei He; Hao Liang Liu; Ke Xia; Wei Yu; Xiang Qun Zhang; Zhao Hua Cheng

doi:10.1088/1367-2630/ab5a06

Tuning non-Gilbert-type damping in FeGa films on MgO(001) via oblique deposition

Yang Li, Yan Li, Qian Liu, Zhe Yuan, Qing Feng Zhan, Wei He, Hao Liang Liu, Ke Xia, Wei Yu, Xiang Qun Zhang, Zhao Hua Cheng

School of Physics and Electronic Science

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

The ability to tailor the damping factor is essential for spintronic and spin-torque applications. Here, we report an approach to manipulate the damping factor of FeGa/MgO(001) films by oblique deposition. Owing to the defects at the surface or interface in thin films, two-magnon scattering (TMS) acts as a non-Gilbert damping mechanism in magnetization relaxation. In this work, the contribution of TMS was characterized by in-plane angular dependent ferromagnetic resonance. It is demonstrated that the intrinsic Gilbert damping is isotropic and invariant, while the extrinsic mechanism related to TMS is anisotropic and can be tuned by oblique deposition. Furthermore, the two and fourfold TMS related to the uniaxial magnetic anisotropy and magnetocrystalline anisotropy were discussed. Our results open an avenue to manipulate magnetization relaxation in spintronic devices.

Original language	English
Article number	123001
Journal	New Journal of Physics
Volume	21
Issue number	12
DOIs	https://doi.org/10.1088/1367-2630/ab5a06
State	Published - 2 Dec 2019

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title = "Tuning non-Gilbert-type damping in FeGa films on MgO(001) via oblique deposition",

abstract = "The ability to tailor the damping factor is essential for spintronic and spin-torque applications. Here, we report an approach to manipulate the damping factor of FeGa/MgO(001) films by oblique deposition. Owing to the defects at the surface or interface in thin films, two-magnon scattering (TMS) acts as a non-Gilbert damping mechanism in magnetization relaxation. In this work, the contribution of TMS was characterized by in-plane angular dependent ferromagnetic resonance. It is demonstrated that the intrinsic Gilbert damping is isotropic and invariant, while the extrinsic mechanism related to TMS is anisotropic and can be tuned by oblique deposition. Furthermore, the two and fourfold TMS related to the uniaxial magnetic anisotropy and magnetocrystalline anisotropy were discussed. Our results open an avenue to manipulate magnetization relaxation in spintronic devices.",

author = "Yang Li and Yan Li and Qian Liu and Zhe Yuan and Zhan, \{Qing Feng\} and Wei He and Liu, \{Hao Liang\} and Ke Xia and Wei Yu and Zhang, \{Xiang Qun\} and Cheng, \{Zhao Hua\}",

note = "Publisher Copyright: {\textcopyright} 2019 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.",

year = "2019",

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day = "2",

doi = "10.1088/1367-2630/ab5a06",

language = "英语",

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T1 - Tuning non-Gilbert-type damping in FeGa films on MgO(001) via oblique deposition

AU - Li, Yang

AU - Li, Yan

AU - Liu, Qian

AU - Yuan, Zhe

AU - Zhan, Qing Feng

AU - He, Wei

AU - Liu, Hao Liang

AU - Xia, Ke

AU - Yu, Wei

AU - Zhang, Xiang Qun

AU - Cheng, Zhao Hua

PY - 2019/12/2

Y1 - 2019/12/2

N2 - The ability to tailor the damping factor is essential for spintronic and spin-torque applications. Here, we report an approach to manipulate the damping factor of FeGa/MgO(001) films by oblique deposition. Owing to the defects at the surface or interface in thin films, two-magnon scattering (TMS) acts as a non-Gilbert damping mechanism in magnetization relaxation. In this work, the contribution of TMS was characterized by in-plane angular dependent ferromagnetic resonance. It is demonstrated that the intrinsic Gilbert damping is isotropic and invariant, while the extrinsic mechanism related to TMS is anisotropic and can be tuned by oblique deposition. Furthermore, the two and fourfold TMS related to the uniaxial magnetic anisotropy and magnetocrystalline anisotropy were discussed. Our results open an avenue to manipulate magnetization relaxation in spintronic devices.

AB - The ability to tailor the damping factor is essential for spintronic and spin-torque applications. Here, we report an approach to manipulate the damping factor of FeGa/MgO(001) films by oblique deposition. Owing to the defects at the surface or interface in thin films, two-magnon scattering (TMS) acts as a non-Gilbert damping mechanism in magnetization relaxation. In this work, the contribution of TMS was characterized by in-plane angular dependent ferromagnetic resonance. It is demonstrated that the intrinsic Gilbert damping is isotropic and invariant, while the extrinsic mechanism related to TMS is anisotropic and can be tuned by oblique deposition. Furthermore, the two and fourfold TMS related to the uniaxial magnetic anisotropy and magnetocrystalline anisotropy were discussed. Our results open an avenue to manipulate magnetization relaxation in spintronic devices.

UR - https://www.scopus.com/pages/publications/85081120993

U2 - 10.1088/1367-2630/ab5a06

DO - 10.1088/1367-2630/ab5a06

M3 - 文章

AN - SCOPUS:85081120993

SN - 1367-2630

VL - 21

JO - New Journal of Physics

JF - New Journal of Physics

IS - 12

M1 - 123001

ER -

Tuning non-Gilbert-type damping in FeGa films on MgO(001) via oblique deposition

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