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Browsing by Author "Movshovich, R."

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    Ferromagnetic Resonance Force Microscopy on a Thin Permalloy Film
    (2007) Nazaretski, E.; Martin, I.; Movshovich, R.; Pelekhov, D. V.; Hammel, P. C.; Zalalutdinov, M.; Baldwin, J. W.; Houston, B.; Mewes, T.; University of Alabama Tuscaloosa
    Ferromagnetic resonance force microscopy (FMRFM) offers a means of performing local ferromagnetic resonance. The authors have studied the evolution of the FMRFM force spectra in a continuous 50 nm thick permalloy film as a function of probe-film distance and performed numerical simulations of the intensity of the FMRFM probe-film interaction force, accounting for the presence of the localized strongly nonuniform magnetic field of the FMRFM probe magnet. Excellent agreement between the experimental data and the simulation results provides insight into the mechanism of FMR mode excitation in a FMRFM experiment.
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    Temperature-dependent Magnetic Resonance Force Microscopy Studies of a Thin Permalloy Film
    Nazaretski, E.; Thompson, J. D.; Movshovich, R.; Zalalutdinov, M.; Baldwin, J. W.; Houston, B.; Mewes, T.; Pelekhov, D. V.; Wigen, P.; Hammel, P. C.; University of Alabama Tuscaloosa
    We used magnetic resonance force microscopy (MRFM) to study a 50 nm thick continuous Permalloy film. We mechanically measured the ferromagnetic resonance signal in the temperature range between 10 and 70 K in the presence of a static magnetic field applied normal to the surface of the film. The measurements show a decrease of the ferromagnetic resonance field with increasing temperature. We attribute this behavior to the temperature-dependent changes of the saturation magnetization. Our experiments demonstrate the potential of MRFM to perform quantitative ferromagnetic resonance measurements as a function of temperature.