Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published May 1, 2000 | Published
Journal Article Open

Imaging mechanisms of force detected FMR microscopy

Abstract

We demonstrate spatial resolution of ferromagnetic resonance in a microscopic sample of YIG using ferromagnetic resonance force microscopy (FMRFM). Measurements were performed on a small single crystal YIG film grown on a GGG substrate, roughly rectangular in shape 20 µm×~150 µm and 3 µm thick. The perpendicular and parallel force geometries of FMRFM, in conjunction with an external bias field both parallel and perpendicular to the film, were used to scan the sample. This enabled the detection of strong signals, even at atmospheric pressure and room temperature. The fundamental and higher-order magnetostatic modes were observed to have 26–29 Gauss separation. The intensity of these modes exhibited spatial variation as the magnetic tip was scanned over the sample, and this behavior is qualitatively explained by DE theory. An improved fabrication method for magnet on cantilever was employed, which yielded a spatial resolution of 15 µm. These results demonstrate the potential of FMRFM for investigating the spatial dependence of ferromagnetic resonance, and for studying the anisotropy fields and exchange coupling effects within multilayer films and small magnetic systems.

Additional Information

© 2000 American Institute of Physics. We gratefully acknowledge funding for this work from the U.S. Department of Energy, Office of Basic Energy Services.

Attached Files

Published - MIDjap00.pdf

Files

MIDjap00.pdf
Files (152.3 kB)
Name Size Download all
md5:313d22e9ff24a9454f7ebd47c9161d9a
152.3 kB Preview Download

Additional details

Created:
August 21, 2023
Modified:
October 16, 2023