TY - JOUR
T1 - Staggered dynamics in antiferromagnets by collective coordinates
AU - Tveten, Erlend G.
AU - Qaiumzadeh, Alireza
AU - Tretiakov, O. A.
AU - Brataas, Arne
PY - 2013/3/21
Y1 - 2013/3/21
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.110.127208
DO - 10.1103/PhysRevLett.110.127208
M3 - Article
AN - SCOPUS:84875448660
VL - 110
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 12
M1 - 127208
ER -