Development of the new measurement techinque for spin dynamics of magnetic thin films

Y. Endo, O. Mori, S. Yabukami, R. Utsumi, Y. Shimada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The spin dynamics in magnetic thin films have attracted much attention from both fundamental and application viewpoints. The dynamics are described using the phenomenological Landau-Lifshitz-Gilbert (LLG) equation consisting of both the precession torque of the magnetization and the damping torque. Especially, a Gilbert damping constant (a), which describes the strength of damping torque, is one of the dominant parameter to predict the dynamics. Until now, we reported the correlation between α and the saturation magnetostriction (λs) for Ni-Fe and Ni-Fe-M films[1]-[3] and found different behaviors of a depending on positive or negative values of λs. To investigate this correlation in more detail, these parameters must be estimated simultaneously for each film using a same measurement instrument. Herein, we proposed a new measurement technique, which employs a microstripe line probe to detect ferromagnetic resonance (FMR) spectra for a magnetic thin film either with tensile stress or stress free, which enables simultaneous evaluation of α and λs

Original languageEnglish
Title of host publication2018 IEEE International Magnetic Conference, INTERMAG 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538664254
DOIs
Publication statusPublished - 2018 Oct 24
Event2018 IEEE International Magnetic Conference, INTERMAG 2018 - Singapore, Singapore
Duration: 2018 Apr 232018 Apr 27

Publication series

Name2018 IEEE International Magnetic Conference, INTERMAG 2018

Other

Other2018 IEEE International Magnetic Conference, INTERMAG 2018
CountrySingapore
CitySingapore
Period18/4/2318/4/27

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation

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