期刊
PHYSICAL REVIEW B
卷 103, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.103.014433
关键词
-
资金
- National Research Foundation (NRF) of Korea [NRF-2020R1A2C3013302]
- Brain Pool Plus Program through the National Research Foundation of Korea - Ministry of Science and ICT [NRF-2020H1D3A2A03099291]
- National Research Foundation of Korea [2020H1D3A2A03099291] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study investigates the modification of ferrimagnetic spin-wave dynamics induced by electrical current, showing that the sign of the Doppler shift is influenced by the handedness of spin waves. When electrons move in the same direction as spin-wave propagation, the attenuation lengths of both right- and left-handed spin waves increase.
We theoretically and numerically study current-induced modification of ferrimagnetic spin-wave dynamics when an electrical current generates adiabatic and nonadiabatic spin-transfer torques. We find that the sign of the Doppler shift depends on the spin-wave handedness because the sign of spin polarization carried by spin waves depends on the spin-wave handedness. It also depends on the sign of the adiabatic-torque coefficient, originating from unequal contributions from two sublattices. For a positive nonadiabaticity of spin current, the attenuation lengths of both right- and left-handed spin waves increase when electrons move in the same direction with spin-wave propagation. Our result establishes a way to simultaneously measure important material parameters of a ferrimagnet, such as angular momentum compensation point, spin polarization, and nonadiabaticity using current-induced control of ferrimagnetic spin-wave dynamics.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据