Study on measurement technique for magnetization dynamics of thin films

Yasushi Endo, Osamu Mori, Yutaka Shimada, Shin Yabukami, Shigeyuki Sato, Ryoichi Utsumi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This paper describes our proposed measurement technique for the magnetization dynamics in thin films, which employs a microstripe line probe to detect ferromagnetic resonance (FMR) spectra for a film sample either with or without tensile stress. By measurement of FMR frequency shifts using Lorentzian fits to the FMR spectra for a film with and without tensile stress, saturation magnetostriction (λs) can be determined. The measured values were compared with those estimated by the optical cantilever method using the same samples in good agreement. At the same time, a Gilbert damping constant (α) was determined using both the FMR frequency and the FMR linewidth for the tensile stress free film. The results of the experiment demonstrate that our proposed measurement technique allows for more precise evaluation of magnetization dynamics by providing information on both α and λs simultaneously for an individual sample.

Original languageEnglish
Article number252403
JournalApplied Physics Letters
Volume112
Issue number25
DOIs
Publication statusPublished - 2018 Jun 18

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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