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Observation of Combined Ferromagnetic/Paramagnetic Phase in Ga1−xMn x As by Magnetic Circular Dichroism

Journal of Superconductivity volume 18, pages 131–135 (2005)Cite this article

Abstract

Magnetic properties of a series of Ga1−xMn x As layers with different Mn and hole concentrations has been studied by measuring magneto-absorption and magnetic circular dichroism (MCD). We first focus on comparing the MCD spectra of samples with unambiguous ferromagnetic or paramagnetic magnetization. We then investigate MCD in a sample with parameters between these two extremes, and interpret the observed behavior in terms of the coexistence of ferromagnetic domains and paramagnetic regions that may result, for example, from inhomogeneities in the sample caused, e.g., by compositional or doping fluctuations.

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Authors and Affiliations

  1. Department of Physics, University of Notre Dame, Notre Dame, Indiana, 46556

    K. J. Yee, R. Chakarvorty, W. L. Lim, X. Liu, M. Kutrowski, L. V. Titova, T. Wojtowicz, J. K. Furdyna & M. Dobrowolska

  2. Institute of Physics, Polish Academy of Sciences, 02-668, Warsaw, Poland

    M. Kutrowski & T. Wojtowicz

  3. Department of Physics, Chungnam National University, Daejeon, 305-764, Korea

    K. J. Yee

Authors
  1. K. J. Yee
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  2. R. Chakarvorty
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  3. W. L. Lim
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  4. X. Liu
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  5. M. Kutrowski
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  6. L. V. Titova
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  7. T. Wojtowicz
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  8. J. K. Furdyna
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  9. M. Dobrowolska
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Correspondence to K. J. Yee.

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Yee, K.J., Chakarvorty, R., Lim, W.L. et al. Observation of Combined Ferromagnetic/Paramagnetic Phase in Ga1−xMn x As by Magnetic Circular Dichroism. J Supercond 18, 131–135 (2005). https://doi.org/10.1007/s10948-005-2164-6

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  • DOI: https://doi.org/10.1007/s10948-005-2164-6

Keywords

  • ferromagnetic semiconductors
  • GaMnAs
  • magnetic circular dichroism