Spin waves in the soft layer of exchange-coupled soft/hard bilayers | Zendy

Zheng-min Xiong | Zendy; Su-qin Ge | Zendy; Xi-guang Wang | Zendy; Zhi-xiong Li | Zendy; Wei Tang | Zendy; Qinglin Xia | Zendy; Daowei Wang | Zendy; Yao-zhuang Nie | Zendy; Zhongming Zeng | Zendy; Guanghua Guo | Zendy

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Spin waves in the soft layer of exchange-coupled soft/hard bilayers

Author(s) -

Zheng-min Xiong,

Su-qin Ge,

Xi-guang Wang,

Zhi-xiong Li,

Wei Tang,

Qinglin Xia,

Daowei Wang,

Yao-zhuang Nie,

Zhongming Zeng,

Guanghua Guo

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4953060

Subject(s) - condensed matter physics , spin wave , magnetization , magnetic field , amplitude , physics , spin (aerodynamics) , magnetization dynamics , field (mathematics) , layer (electronics) , magnetic moment , materials science , ferromagnetism , optics , nanotechnology , quantum mechanics , mathematics , pure mathematics , thermodynamics

The magnetic dynamical properties of the soft layer in exchange-coupled soft/hard bilayers have been investigated numerically using a one-dimensional atomic chain model. The frequencies and spatial profiles of spin wave eigenmodes are calculated during the magnetization reversal process of the soft layer. The spin wave modes exhibit a spatially modulated amplitude, which is especially evident for high-order modes. A dynamic pinning effect of surface magnetic moment is observed. The spin wave eigenfrequency decreases linearly with the increase of the magnetic field in the uniformly magnetized state and increases nonlinearly with field when spiral magnetization configuration is formed in the soft layer

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