Theory of momentum-resolved magnon electron energy loss spectra: The case of Yttrium Iron Garnet

2024/01/22 by Julio A. do Nascimento, P. J. Hasnip, Nascimento, Julio A. do +13 · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Magneto-Optical Properties and Applications #Materials Science (cond-mat.mtrl-sci) #Physics of Superconductivity and Magnetism

paper · pdf · doi:10.48550/arxiv.2401.12302

openalex publication_date 2024/01/22 · openalex created_date 2024/01/25 · openalex updated_date 2026/07/28

Abstract

We explore the inelastic spectra of electrons impinging in a magnetic system. The methodology here presented is intended to highlight the charge-dependent interaction of the electron beam in a STEM-EELS experiment, and the local vector potential generated by the magnetic lattice. This interaction shows an intensity 10^-2 smaller than the purely spin interaction, which is taken to be functionally the same as in the inelastic neutron experiment. On the other hand, it shows a strong scattering vector dependence (κ^-4) and a dependence with the relative orientation between the probe wavevector and the local magnetic moments of the solid. We present YIG as a case study due to its high interest by the community.

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• Theory of Momentum-Resolved Electron Energy-Loss Spectra of Coupled Phonon and Magnon Excitations

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