Determination of switching field distributions for perpendicular recording media

• Published in: IEEE transactions on magnetics Vol. 39; no. 1; pp. 590 - 593
• Main Authors: van de Veerdonk, R.J.M., Xiaowei Wu, Weller, D.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.01.2003; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• 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; Magnetization reversal; Magnetization curve; Magnetic characterization; switching field distribution; Platinum base alloys; Perpendicular recording; Ternary alloys; Recording material; Chromium alloys; Experimental study; Cobalt alloys; Magnetic recording
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2002.806339

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.