Excitation of Bulk Spin Waves by Acoustic Wave at the Plane Defect of a Ferromagnet
Y. Gusievaa, P. Graczykb, O. Gorobetsa,c and M. Krawczykb
aNational Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", 37 Peremogy ave., 03056, Kyiv, Ukraine
bFaculty of Physics, Adam Mickiewicz University in Poznan, Umultowska 85, PoznaƄ, 61-614, Poland
cInstitute of Magnetism, National Academy of Sciences of Ukraine, 36-b Vernadskogost., 03142, Kyiv, Ukraine
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Excitation of bulk spin waves by acoustic wave localized on the elastic planar defect in the bulk ferromagnet was analytically and numerically investigated. We showed that besides magnetic oscillations forced by acoustic wave strain the resonance between Kosevich wave and bulk spin wave can occurs. For the frequency of the Kosevich wave far below the resonance frequency the amplitude of dynamic magnetization is negligible. For the frequency above the resonance the acoustic wave excites bulk spin wave of the same frequency but different absolute value of the wave vector.

DOI: 10.12693/APhysPolA.133.489
PACS numbers: 75.30 Ds, 75.78.-n, 75.80.+q