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Spin wave resonance in Ga1−xMnxAs

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2003

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Graf, Thomas
Wassner, Thomas
Brandt, Martin S.
Stutzmann, Martin
Philipp, Jan Boris
Gross, Rudolf
Krieger, Michael
Zürn, Klaus
Ziemann, Paul
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Applied Physics Letters. American Institute of Physics (AIP). 2003, 82(5), pp. 730-732. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.1539550

Zusammenfassung

We report ferromagnetic resonance experiments on Ga1−xMnxAs thin films. For the dc magnetic field perpendicular to the sample plane, we observe up to eight distinct resonances, which we attribute to spin wave modes. To account for the spacing of the resonances, we infer a linear gradient in the magnetic properties, which is ascribed to a linear variation of the uniaxial magnetic anisotropy with film thickness. Values of D=(1±0.4)×10−9 Oe cm2 for the spin stiffness and JMnMn≈1 meV for the exchange integral between Mn spins are obtained.

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ISO 690GOENNENWEIN, Sebastian T. B., Thomas GRAF, Thomas WASSNER, Martin S. BRANDT, Martin STUTZMANN, Jan Boris PHILIPP, Rudolf GROSS, Michael KRIEGER, Klaus ZÜRN, Paul ZIEMANN, 2003. Spin wave resonance in Ga1−xMnxAs. In: Applied Physics Letters. American Institute of Physics (AIP). 2003, 82(5), pp. 730-732. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.1539550
BibTex
@article{Goennenwein2003reson-52806,
  year={2003},
  doi={10.1063/1.1539550},
  title={Spin wave resonance in Ga<sub>1−x</sub>Mn<sub>x</sub>As},
  number={5},
  volume={82},
  issn={0003-6951},
  journal={Applied Physics Letters},
  pages={730--732},
  author={Goennenwein, Sebastian T. B. and Graf, Thomas and Wassner, Thomas and Brandt, Martin S. and Stutzmann, Martin and Philipp, Jan Boris and Gross, Rudolf and Krieger, Michael and Zürn, Klaus and Ziemann, Paul}
}
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