Design of domain wall spin torquemeter

Katsuyoshi Matsushita, Munetaka Sasaki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We investigate an AC-driven oscillation of a domain wall in a one-dimensional clean ferromagnetic wire in order to design an effective domain wall spin torquemeter. The amplitude of the oscillation is evaluated by the collective coordinate method, and its dependence on the nonadiabatic torque constant β is clarified. We showed that the amplitude has an oscillatory component as a function of the AC amplitude. The oscillation period is inversely proportional to |β - α|, where α is the Gilbert damping constant. This result indicates that the measurement of the amplitude enables us to precisely evaluate β.

Original languageEnglish
Article number043801
Journaljournal of the physical society of japan
Volume84
Issue number4
DOIs
Publication statusPublished - 2015 Apr 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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