Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

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 March 29, 2024)
Created March 11, 2003, Updated October 12, 2021