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Rev. Sci. Instrum. 81, 073902 (2010); http://dx.doi.org/10.1063/1.3454918 (4 pages)

Wide-range wavevector selectivity of magnon gases in Brillouin light scattering spectroscopy

C. W. Sandweg1, M. B. Jungfleisch1, V. I. Vasyuchka1, A. A. Serga1, P. Clausen1, H. Schultheiss1, B. Hillebrands1, A. Kreisel2, and P. Kopietz2

1Fachbereich Physik and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
2Institut für Theoretische Physik, Universität Frankfurt, 60438 Frankfurt, Germany

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(Received 21 April 2010; accepted 21 May 2010; published online 6 July 2010)

Brillouin light scattering spectroscopy is a powerful technique for the study of fast magnetization dynamics with both frequency and wavevector resolutions. Here, we report on a distinct improvement of this spectroscopic technique toward two-dimensional wide-range wavevector selectivity in a backward scattering geometry. Spin-wave wavevectors oriented perpendicularly to the bias magnetic field are investigated by tilting the sample within the magnet gap. Wavevectors which are oriented parallel to the applied magnetic field are analyzed by turning the entire setup, including the magnet system. The setup features a wide selectivity of wavevectors up to 2.04×105 rad/cm for both orientations, and allows selecting and measuring wavevectors of dipole- and exchange-dominated spin waves of any orientation to the magnetization simultaneously.

© 2010 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. SETUP
  3. EXPERIMENTAL DATA
  4. CONCLUSION

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KEYWORDS and PACS

PACS

  • 07.60.Rd

    Visible and ultraviolet spectrometers

  • 75.30.Ds

    Spin waves

  • 75.78.-n

    Magnetization dynamics

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

  • 75.40.Gb

    Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.)

  • 78.35.+c

    Brillouin and Rayleigh scattering; other light scattering

ARTICLE DATA

PUBLICATION DATA

ISSN

0034-6748 (print)  
1089-7623 (online)

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