Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Nonlinear magnetooptic measurement of flux propagation dynamics in thin Permalloy films

Published

Author(s)

Thomas J. Silva, Matthew R. 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
Created March 12, 2003, Updated February 19, 2017