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

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Author(s): Michael Schneider; Thomas Gerrits; Anthony B. Kos; Thomas J. Silva;
Title: Experimental determination of the inhomogeneous contribution to linewidth in Permalloy films using a time-resolved magneto-optic Kerr effect microprobe
Published: September 12, 2007
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
Pages: pp. 053910-1 - 053910-4
Keywords: magneto optic kerr effect, spin dynamics
Research Areas: Electromagnetics
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