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.

Simultaneous measurement of surface and bulk vector magnetization dynamics in thin Ni-Fe films

Published

Author(s)

Matthew R. Pufall, Thomas J. Silva

Abstract

The dynamics of the surface and 'bulk' magnetization vectors of a Ni-Fe thin film were measured using the time-resolved second harmonic and linear magnetooptical Kerr effects. Films of 50, 250, and 400 nm thickness were measured. The magnetization dynamics of the surface and 'bulk' in response to a pulsed torque field were effectively the same for all thicknesses, indicating that any induced eddy currents do not appreciably screen the interior of the film from the incident magnetic field at these thicknesses. The magnetization angle also showed both a large, fast (≥1 ns) initial response to an applied field pulse, and then a slower (≥≥ 10-100 ns) 'viscous' creep toward its dc value. Possible mechanisms for these observations are discussed.
Citation
IEEE Transactions on Magnetics
Volume
38
Issue
1

Keywords

bulk magnetization, magnetization dynamics, magneto-optical Kerr effect, nickel-iron films, surface magnetization
Created February 1, 2002, Updated February 19, 2017