Magnetization damping in noncollinear spin valves with antiferromagnetic interlayer couplings

Takahiro Chiba, Gerrit E.W. Bauer, Saburo Takahashi

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

We study the magnetic damping in the simplest of synthetic antiferromagnets, i.e., antiferromagnetically exchange-coupled spin valves, in the presence of applied magnetic fields that enforce noncolliear magnetic configurations. We formulate the dynamic exchange of spin currents in a noncollinear texture based on the spin-diffusion theory with quantum mechanical boundary conditions at the ferrromagnet/normal-metal interfaces and derive the Landau-Lifshitz-Gilbert equations coupled by the interlayer static and dynamic exchange interactions. We predict noncollinearity-induced additional damping that is modulated by an applied magnetic field. We compare theoretical results with published experiments.

Original languageEnglish
Article number054407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number5
DOIs
Publication statusPublished - 2015

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