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Nonlinear magnetooptic measurement of flux propagation dynamics in thin Permalloy films

Published

Author(s)

Thomas J. Silva, Matthew Pufall, Pavel Kabos

Abstract

Time-resolved nonlinear optics are used to study the propagation of magnetic flux pulses in a 250 nm Permalloy film. The flux is generated in the film by coupling it to a coplanar waveguide structure driven with broadband voltage pulses. Flux pulses propagated in the film with a phase velocity of 4.2 × 10 5 m/s and a group velocity of 1.5 × 105 n/s. Both velocities are consistent with the predictions of Damon-Eshbach theory for magnetostatic surface waves with 200-300 υm wavelengths. Within 100 υm of the excitation source, flux pulses decayed monotonically but with no measurable delay. © 2002 American Institute of Physics. [DOI:10.1063/1.1421040]
Citation
Journal of Applied Physics
Volume
91
Issue
3

Keywords

coplanar waveguide, Damon-Eshbach modes, group velocity, magnetic flux pulses, magnetic thin films, magnetostatic surface waves, Permalloy, phase velocity, second-harmonic magnetooptic Kerr effect

Citation

Silva, T. , Pufall, M. and Kabos, P. (2003), Nonlinear magnetooptic measurement of flux propagation dynamics in thin Permalloy films, Journal of Applied Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=30812 (Accessed April 18, 2024)
Created March 11, 2003, Updated October 12, 2021