Absence of spin-mixed states in ferrimagnet Yttrium iron garnet

D. Cheshire, P. Bencok, D. Gianolio, G. Cibin, V. K. Lazarov, G. Van Der Laan, S. A. Cavill*

*Corresponding author for this work

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The spectroscopic g-factor of epitaxial thin film Yttrium Iron Garnet (YIG) has been studied using a combination of ferromagnetic resonance spectroscopy and x-ray magnetic circular dichroism. The values obtained by the two techniques are found, within experimental error, to be in agreement using Kittel's original derivation for the g-factor. For an insulating material with an entirely Fe3+ configuration, a spin mixing correction to Kittel's derivation of the spectroscopic g-factor, as recently shown by Shaw et al. [Phys. Rev. Lett. 127, 207201 (2021)] for metallic systems, is not required and demonstrates that the spin mixing parameter is small in YIG due to negligible spin-orbit coupling.

Original languageEnglish
Article number103902
Number of pages6
JournalJournal of Applied Physics
Issue number10
Publication statusPublished - 14 Sept 2022

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