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arXiv · 2410.22042

Spin wave frequency hysteresis in Ir/Co/Pt multilayers with Dzyaloshinskii-Moriya interaction

Ryszard Gieniusz·Pawel Gruszecki·Jan Kisielewski·Anuj Kumar Dhiman·Michal Matczak·Zbigniew Kurant·Iosif Sveklo·Urszula Guzowska·Maria Tekielak·Maciej Krawczyk·Feliks Stobiecki·Andrzej Maziewski
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Abstract

Results of extensive combined experimental and theoretical investigations on static and dynamic properties of Ir/Co/Pt multilayer with low uniaxial anisotropy and asymmetric Ir/Co and Co/Pt interfaces responsible for large interfacial Dzyaloshinskii-Moriya interaction (IDMI) are presented. Within longitudinal magneto-optical Kerr effect-based microscopy and magnetic force microscopy studies a complex magnetic configuration was detected: large in-plane magnetized domains of several dozen micrometers size were modulated by a weak stripe domain pattern with periods of about 100 nm. Using Brillouin Light Scattering spectrometry, the hysteresis of the Stokes and anti-Stokes peaks frequencies was observed as a function of the magnetic field. This hysteretic behavior associated with IDMI-induced asymmetry of spin waves dispersion is correlated with switching of the large macro-domains. Using micromagnetic simulations we determine field-dependent magnetization distributions and dispersion relations, proposing an explanation of the observed behavior. The investigated nanostructure can be used as non-volatile spin waves velocity switcher.

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Ryszard Gieniusz, Pawel Gruszecki, Jan Kisielewski, Anuj Kumar Dhiman, Michal Matczak, Zbigniew Kurant, Iosif Sveklo, Urszula Guzowska, Maria Tekielak, Maciej Krawczyk, Feliks Stobiecki, Andrzej Maziewski. 2024-10-29. Spin wave frequency hysteresis in Ir/Co/Pt multilayers with Dzyaloshinskii-Moriya interaction. https://doi.org/10.1103/physrevb.110.184410

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