Staggered dynamics in antiferromagnets by collective coordinates

Erlend G. Tveten, Alireza Qaiumzadeh, O. A. Tretiakov, Arne Brataas

Research output: Contribution to journalArticlepeer-review

113 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number127208
JournalPhysical review letters
Volume110
Issue number12
DOIs
Publication statusPublished - 2013 Mar 21

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Staggered dynamics in antiferromagnets by collective coordinates'. Together they form a unique fingerprint.

Cite this