Tunable Magnetic Thermal Hysteresis for Total Moment in Fe and Co/Gd Multilayers

ORAL

Abstract

We investigated the magnetic thermal hysteresis in Fe/Gd and Co/Gd multilayers for the first time by SQUID magnetometry. Total magnetic moment of the antiferromagnetically coupled sublayers show a bow-tie shape with respect to temperature indicating magnetic superheating and supercooling. The width of the ``bow-tie'' figures can be \textit{tuned} to have values of 200K or higher by decreasing the external field strength and/or thickness of the multilayers. The results are in excellent agreement with theoretical calculations.

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Authors

  • Sezen Demirtas

  • Maria R. Hossu

    • Department of Physics, The University of Texas at Arlington, Arlington, TX 76019 USA

  • Robert E. Camley

    • Department of Physics, The University of Colorado at Colorado Springs, Colorado Springs, CO 80933, USA
    • Department of Physics, University of Colorado at Colorado Springs, Colorado Springs, CO 80933 USA

  • Hector C. Mireles

    • Physics Department, California State Polytechnic University, Pomona, CA 91768 USA

  • Ali R. Koymen

    • The University of Texas at Arlington