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.

–

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