Anisotropic magneto-crystalline coupling of the skyrmion lattice in MnSi
Yongkang Luo, Shi-Zeng Lin, D. M. Fobes, Zhiqi Liu, E. D. Bauer, J. B., Betts, A. Migliori, J. D. Thompson, M. Janoschek, and B. Maiorov
TL;DR
This study explores the anisotropic magnetocrystalline coupling in MnSi's skyrmion lattice using ultrasound spectroscopy, revealing abrupt elastic changes linked to SKX orientation switching, which advances understanding for spintronics.
Contribution
It provides the first detailed experimental analysis of anisotropic magnetocrystalline coupling effects on skyrmion lattice orientation in MnSi.
Findings
Abrupt elastic moduli changes at specific crystallographic directions.
Identification of SKX orientation switching due to anisotropic coupling.
Phenomenological model explaining the coupling mechanism.
Abstract
We investigate the anisotropic nature of magnetocrystalline coupling between the crystallographic and skyrmion crystal (SKX) lattices in the chiral magnet MnSi by magnetic field-angle resolved resonant ultrasound spectroscopy. Abrupt changes are observed in the elastic moduli and attenuation when the magnetic field is parallel to the [011] crystallographic direction. These observations are interpreted in a phenomenological Ginzburg-Landau theory that identifies switching of the SKX orientation to be the result of an anisotropic magnetocrystalline coupling potential. Our paper sheds new light on the nature of magnetocrystalline coupling potential relevant to future spintronic applications.
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