作者
Erlend G Tveten, Alireza Qaiumzadeh, OA Tretiakov, Arne Brataas
发表日期
2013/3/21
期刊
Physical Review Letters
卷号
110
期号
12
页码范围
127208
出版商
American Physical Society
简介
Antiferromagnets can be used to store and manipulate spin information, but the coupled dynamics of the staggered field and the magnetization are very complex. We present a theory which is conceptually much simpler and which uses collective coordinates to describe staggered field dynamics in antiferromagnetic textures. The theory includes effects from dissipation, external magnetic fields, as well as reactive and dissipative current-induced torques. We conclude that, at low frequencies and amplitudes, currents induce collective motion by means of dissipative rather than reactive torques. The dynamics of a one-dimensional domain wall, pinned at 90° at its ends, are described as a driven harmonic oscillator with a natural frequency inversely proportional to the length of the texture.
引用总数
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学术搜索中的文章
EG Tveten, A Qaiumzadeh, OA Tretiakov, A Brataas - Physical review letters, 2013