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Experimental determination of the inhomogeneous contribution to linewidth in Permalloy films using a time-resolved magneto-optic Kerr effect microprobe

Published

Author(s)

Michael Schneider, Thomas Gerrits, Anthony B. Kos, Thomas J. Silva

Abstract

We adapted a time-resolved magneto-optic microprobe for use with the pulsed inductive microwave magnetometer apparatus, allowing us to measure the magnetization dynamics of a thin Permalloy film at micrometer and millimeter length scales under exactly the same experimental conditions. The optical microprobe has a spatial resolution of one micrometer. We compare the data obtained over these different length scales to quantitatively determine the localized inhomogeneous contribution to magnetic damping. When measured directly with the magneto-optic technique, the inhomogeneous contributions are in agreement with the value of 88 plus or minus} 16 A/m (1.1 plus or minus} 0.2 Oe) extrapolated from PIMM measurements of linewidth versus frequency.
Citation
Journal of Applied Physics
Volume
102
Issue
053910

Keywords

magneto optic kerr effect, spin dynamics

Citation

Schneider, M. , Gerrits, T. , Kos, A. and Silva, T. (2007), Experimental determination of the inhomogeneous contribution to linewidth in Permalloy films using a time-resolved magneto-optic Kerr effect microprobe, Journal of Applied Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32622 (Accessed November 30, 2022)
Created September 11, 2007, Updated October 12, 2021