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Ultrafast magnetoelastic probing of surface acoustic transients

Janusonis, J., Chang, C. L., Jansma, T., Gatilova, A., Vlasov, V. S., Lomonosov, A. M., Temnov, V. V. & Tobey, R. I., 13-Jul-2016, In : Physical Review. B: Condensed Matter and Materials Physics. 94, 2, 7 p., 024415.

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DOI

  • J. Janusonis
  • C. L. Chang
  • T. Jansma
  • A. Gatilova
  • V. S. Vlasov
  • A. M. Lomonosov
  • V. V. Temnov
  • R. I. Tobey

We generate in-plane magnetoelastic waves in nickel films using the all-optical transient grating technique. When performed on amorphous glass substrates, two dominant magnetoelastic excitations can be resonantly driven by the underlying elastic distortions, the Rayleigh surface acoustic wave and the surface skimming longitudinal wave. An applied field, oriented in the sample plane, selectively tunes the coupling between magnetic precession and one of the elastic waves, thus demonstrating selective excitation of coexisting, large-amplitude magnetoelastic waves. Analytical calculations based on the Green's function approach corroborate the generation of multiple surface acoustic transients with disparate decay dynamics.

Original languageEnglish
Article number024415
Number of pages7
JournalPhysical Review. B: Condensed Matter and Materials Physics
Volume94
Issue number2
Publication statusPublished - 13-Jul-2016

    Keywords

  • SUBWAVELENGTH HOLE ARRAYS, EVANESCENT-WAVE MODEL, OPTICAL-TRANSMISSION, THIN-FILMS

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