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Spin wave resonance in yttrium iron garnet stripe domains

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arxiv 2505.08431 v2 pith:T5RMNRL2 submitted 2025-05-13 cond-mat.mtrl-sci

Daniel Prestwood , Chris E. A. Barker , Kilian D. Stenning , Charlie W. F. Freeman , Tianyi Wei , Takashi Kikkawa , Troy Dion , Daniel Stoeffler
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Yves Henry Matthieu Bailleul Noora Naushad William Griggs Thomas Thomson Murat Cubukcu Jack C. Gartside Eiji Saitoh Will R. Branford Hidekazu Kurebayashi
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classification cond-mat.mtrl-sci
keywords domainmagneticanisotropyresonancespectrastripecubicdomains
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We study a thin film yttrium iron garnet sample that exhibits magnetic stripe domains due to a small perpendicular magnetic anisotropy. Using wide-field magneto-optic Kerr effect measurements we reveal the domain pattern evolution as a function of applied field and discuss the role of the cubic anisotropy in the domain formation. Rich magnon spectra are observed in the stripe domain states, with a range of excitation conditions providing distinct spectra. The measurements are interpreted using micromagnetic simulations to provide the spatial profiles of each resonance mode. We further simulate domain patterns and resonance spectra accounting for the cubic anisotropy,with good correlation to experiment. This study highlights how non-collinear magnetic domain structures can host complex resonant behaviour in a low-damping magnetic material, with potential use in future magnonic applications.

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  1. Spin-wave softening across the uniform-to-stripe domain transition in iron garnet film

    cond-mat.mes-hall 2026-07 conditional novelty 6.0 of 10

    In a perpendicular-anisotropy BiYIG film, the spin-wave branch that softens at a finite wavevector before the uniform-to-stripe transition has a wavelength matching the stripe period, and new modes appear in the stripe state.

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