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Ferromagnetic Resonance in Ga1−x Mn x As

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Abstract

We report on ferromagnetic resonance measurements of Ga1−x Mn x As thin films with Mn contents 0.022 ≤ x ≤ 0.051. For x ≥ 0.036 and the external magnetic field normal to the thin film, we observe several resonances, which we identify as spin wave resonances. The non-quadratic mode spacing can be consistently explained by a linear gradient in the magnetic properties of the films. From the measurements, the exchange constant A can be deduced for different Mn contents x.

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Authors and Affiliations

  1. Walter Schottky Institut, Technische Universität München, D-85748, Garching, Germany

    S. T. B. Goennenwein, T. Graf, T. Wassner, M. S. Brandt & M. Stutzmann

  2. Abteilung Halbleiterphysik, Universität Ulm, D-89069, Ulm, Germany

    A. Koeder, S. Frank, W. Schoch & A. Waag

Authors
  1. S. T. B. Goennenwein
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  2. T. Graf
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  3. T. Wassner
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  4. M. S. Brandt
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  5. M. Stutzmann
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  6. A. Koeder
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  7. S. Frank
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  8. W. Schoch
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  9. A. Waag
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Goennenwein, S.T.B., Graf, T., Wassner, T. et al. Ferromagnetic Resonance in Ga1−x Mn x As. Journal of Superconductivity 16, 75–78 (2003). https://doi.org/10.1023/A:1023284617994

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  • DOI: https://doi.org/10.1023/A:1023284617994

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