NDLI: The reversal mechanism and coercivity of Pt/sub 3/Co alloy film

Content Provider	IEEE Xplore Digital Library
Author	Tang, Y.J. Wong, S.K. Hung, T.F. Pakhomov, A.B. Wong, C.Y.
Copyright Year	1965
Abstract	In this article, Pt/sub 3/Co alloy film is produced using a sputtering system. To understand the reversal mechanism of the Pt/sub 3/Co alloy film, the recoil loops from the major hysteresis loop have been measured. The reversible magnetization M/sub rev/ dependence of the irreversible magnetization M/sub irr/ exhibits a minimum when M/sub irr/ is slightly larger than zero, which is the characteristic of a material that contains domain walls bowing during reversal caused by localized pinning due to dipolar fields for the films. By analyzing the linear dependence of the coercivity on the anisotropy field at different temperatures, the strength of the local dipolar fields N/sub eff/, which influences the creation of the reversed magnetic nucleus, is estimated. We found a positive value of N/sub eff/, which indicates that reversal process is favored by dipolar fields. It is also supposed that the dipolar fields originated from irregular local random anisotropy caused by residual stress, cavities, or inclusions, may be effective sources of pinning in the reversal process, and may strongly affect the coercivity of the film.
Sponsorship	IEEE Magnetics Society
Starting Page	1306
Ending Page	1308
Page Count	3
File Size	60816
File Format	PDF
ISSN	00189464
Volume Number	37
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coercive force Cobalt alloys Platinum alloys Magnetization Magnetic materials Anisotropic magnetoresistance Sputtering Magnetic hysteresis Magnetic films Magnetic analysis
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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