Ferromagnetic resonance force microscopy of a permalloy film

ORAL

Abstract

We describe Ferromagnetic Resonance Force Microscopy (FMRFM) experiments performed on a 50 nm thick permalloy film. We have studied the evolution of the FMRFM force spectra as a function of temperature. The temperature-dependent studies show a decrease of the ferromagnetic resonance field with increasing temperature which we attribute to the temperature-dependent changes of the saturation magnetization. The experiments demonstrate the potential of FMRFM to study temperature dependent ferromagnetic resonance phenomena. We analyzed the FMRFM force spectra evolution as a function of the probe-film distance and performed numerical simulations of the intensity of the FMRFM probe-sample interaction force. Excellent agreement between the experimental data and the simulation results provides the new insight into the mechanism of the FMR mode excitation in an FMRFM experiment.

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Authors

  • E. Nazaretski

    • Los Alamos National Laboratory

  • I. Martin

    • Los Alamos National Laboratory

  • J.D. Thompson

    • Los Alamos National Laboratory

  • R. Movshovich

    • Los Alamos National Laboratory

  • D.V. Pelekhov

    • Ohio State University

  • P.C. Hammel

    • Ohio State University

  • P. Wigen

    • Ohio State University

  • M. Zalalutdinov

    • SFA Inc.

  • T. Mewes

    • University of Alabama

  • J. Baldwin

    • Naval Research Laboratory

  • B. Houston

    • Naval Research Laboratory