Theoretical study of thermally activated magnetization switching under microwave assistance: Switching paths and barrier height

H. Suto, K. Kudo, T. Nagasawa, T. Kanao, K. Mizushima, R. Sato, S. Okamoto, N. Kikuchi, O. Kitakami

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Energy barrier height for magnetization switching is theoretically studied for a system with uniaxial anisotropy in a circularly polarized microwave magnetic field. A formulation of the Landau-Lifshitz-Gilbert equation in a rotating frame introduces an effective energy that includes the effects of both the microwave field and static field. This allows the effective-energy profiles to rigorously describe the switching paths and corresponding barrier height, which govern thermally activated magnetization switching under microwave assistance. We show that fixed points and limit cycles in the rotating frame lead to various switching paths and that under certain conditions, switching becomes a two-step process with an intermediate state.

Original languageEnglish
Article number094401
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number9
DOIs
Publication statusPublished - 2015 Mar 2

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Theoretical study of thermally activated magnetization switching under microwave assistance: Switching paths and barrier height'. Together they form a unique fingerprint.

Cite this