Microscopic evaluation of spin and orbital moment in ferromagnetic resonance

Author:

Ishii Yuta,Yamasaki Yuichi,Kozuka Yusuke,Lustikova Jana,Nii Yoichi,Onose Yoshinori,Yokoyama Yuichi,Mizumaki Masaichiro,Adachi Jun-ichi,Nakao Hironori,Arima Taka-hisa,Wakabayashi Yusuke

Abstract

AbstractTime-resolved X-ray magnetic circular dichroism under the effects of ferromagnetic resonance (FMR), known as X-ray ferromagnetic resonance (XFMR) measurements, enables direct detection of precession dynamics of magnetic moment. Here we demonstrated XFMR measurements and Bayesian analyses as a quantitative probe for the precession of spin and orbital magnetic moments under the FMR effect. Magnetization precessions in two different Pt/Ni-Fe thin film samples were directly detected. Furthermore, the ratio of dynamical spin and orbital magnetic moments was evaluated quantitatively by Bayesian analyses for XFMR energy spectra around the Ni $$L_{2,3}$$ L 2 , 3 absorption edges. Our study paves the way for a microscopic investigation of the contribution of the orbital magnetic moment to magnetization dynamics.

Funder

Precursory Research for Embryonic Science and Technology

Japan Society for the Promotion of Science

World Premier International Research Center Initiative (WPI), MEXT

Publisher

Springer Science and Business Media LLC

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