NDLI: Magnetisation distributions in thin film recording heads by Type II contrast

Content Provider	IEEE Xplore Digital Library
Author	Ferrier, R.P. McVitie, S. Nicholson, W.A.P.
Copyright Year	1965
Abstract	The magnetic domain structure of the polepieces of thin-film magnetic recording heads and its variation with drive current and frequency are of interest in understanding the read/write properties of the head. The authors describe the setting up of the synchronous detection mode of type II backscattered electron contrast in a 200-kV electron microscope and its application to the study of domain wall movement in the P2 polepieces of heads with and without the 15-20- mu m-thick alumina overlayer in place. Extension of the method to allow evaluation of the changes in magnetization directions under AC drive conditions is described. The authors also demonstrate a novel technique which gives information on the remanent state of the domain structure in the P2 polepiece and its changes under DC drive conditions. It is concluded that these improvements in technique, taken together with the capability of the synchronous detection method to provide information on changes of magnetic structure with depth, mean that this experimental tool will be invaluable in its own right as well as complementary to the Kerr imaging methods.<>
Sponsorship	IEEE Magnetics Society
Starting Page	1337
Ending Page	1339
Page Count	3
File Size	516588
File Format	PDF
ISSN	00189464
Volume Number	26
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetization Transistors Magnetic heads Magnetic films Magnetic recording Magnetic domains Electrons Drives Frequency Magnetic properties
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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