Determination of switching field distributions for perpendicular recording media

We present a novel experimental method to determine the switching field distribution in perpendicular thin-film magnetic recording media. The method assumes a constant demagnetization factor independent of the magnetic state during switching and a log-normal switching field distribution. The new tec...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2003-01, Vol.39 (1), p.590-593
Main Authors: van de Veerdonk, R.J.M., Xiaowei Wu, Weller, D.
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Deconvolution
Demagnetization
Exact sciences and technology
Magnetic field measurement
Magnetic films
Magnetic properties and materials
Magnetic recording
Magnetic recording materials
Magnetic storage
Magnetic switching
Magnetism
Magnetization
Magnetostatics
Media
Metals. Metallurgy
Perpendicular magnetic recording
Physics
Recoil
Recording instruments
Remanence
Studies of specific magnetic materials
Switching
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Summary:We present a novel experimental method to determine the switching field distribution in perpendicular thin-film magnetic recording media. The method assumes a constant demagnetization factor independent of the magnetic state during switching and a log-normal switching field distribution. The new technique allows a deconvolution of the effects of the switching field distribution and demagnetization, which is important for the development of low-noise perpendicular magnetic recording media. Results are discussed for a series of recoil loop measurements for a perpendicular CoCrPt alloy medium.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2002.806339