非線形磁化ダイナミクスの定量評価法

Translated title of the contribution: Experimental method for quantitative evaluation of nonlinear magnetization dynamics

Genki Okano, Yukio Nozaki

Research output: Contribution to journalArticlepeer-review

Abstract

We have developed an experimental technique to investigate a nonlinear magnetization dynamics resonantly excited by strong microwave fields. In this technique, a magnetization switching was observed when a sub-nanosecond wide pulsed field was applied to the ferromagnetic resonance-excited ferromagnets. Such a cooperative switching with simultaneous application of microwave- and pulsed-fields can evaluate an effective energy barrier for magnetization switching in various nonlinear magnetization dynamics. In this review, we show the experimental results on (1) the temporal evolution of the energy barrier in the transient of magnetization precession growth and (2) the observation of saddle-node bifurcation in the microwave-excited nonlinear magnetization dynamics.

Translated title of the contributionExperimental method for quantitative evaluation of nonlinear magnetization dynamics
Original languageJapanese
Pages (from-to)99-104
Number of pages6
JournalIEEJ Transactions on Fundamentals and Materials
Volume141
Issue number2
DOIs
Publication statusPublished - 2021 Feb 1

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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