Measurements of 1/f Noise in CuMn and AgMn Thin Films

ORAL

Abstract

We have measured the 1/f noise in the spin glass state of CuMn and AgMn thin films. The Mn concentrations we have investigated are approximately 11% Mn for the CuMn samples studied and 12% in the case of AgMn. Our CuMn results are consistent with previous measurements that have demonstrated low-frequency resistance fluctuations increase in magnitude as a spin glass is cooled below the glass temperature Tg, but with some significant differences. Similar to the CuMn, we find a rather abrupt increase in the 1/f noise when the AgMn is cooled to below the glass temperature. A comparison of the noise between the two systems and previous measurements will be presented.

*Work supported by DOE Award Number DE-SC0013599.

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Presenters

  • David Harrison

    • Physics, University of Minnesota
    • School of Physics and Astronomy, University of Minnesota
    • University of Minnesota

Authors

  • David Harrison

    • Physics, University of Minnesota
    • School of Physics and Astronomy, University of Minnesota
    • University of Minnesota

  • E Dahlberg

    • School of Physics and Astronomy, University of Minnesota
    • Physics, Univ of Minnesota

  • Raymond Orbach

    • Physics, University of Texas
    • Texas Materials Institute, The University of Texas at Austin
    • The University of Texas at Austin
    • Univ of Texas