Methods for determination of response times of magnetic head materials

Author

Silva, T.J. ; Crawford, T.M.

Author_Institution

Nat. Inst. of Stand. & Technol., Boulder, CO, USA

Volume

35

Issue

2

fYear

1999

fDate

3/1/1999 12:00:00 AM

Firstpage

671

Lastpage

676

Abstract

Measurements of magnetization response times in thin-film Permalloy are made by both electrical and optical methods. The electrical method measures the inductive voltage generated in a waveguide by the changing magnetization. The optical technique uses standard pump-probe sampling methods combined with the second-harmonic magneto-optic Kerr effect to directly measure magnetization angle as a function of time. Results of these measurements for a 75 nm thick Permalloy film are in good qualitative agreement

Keywords

Kerr magneto-optical effect; Permalloy; magnetic heads; magnetic thin film devices; magnetic thin films; magnetisation; 75 nm; Permalloy thin films; electrical methods; inductive voltage; magnetic head materials; magnetization angle; magnetization response times; optical methods; second-harmonic magneto-optic Kerr effect; standard pump-probe sampling methods; Delay; Electric variables measurement; Magnetic heads; Magnetization; Measurement standards; Nonlinear optics; Optical films; Optical pumping; Optical waveguides; Voltage measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.750626

Filename

750626