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On the origin of stable remanence in pseudo-single domain grainsA critique is presented of the quantitative model for the magnetic moment of pseudo-single domain grains (hypothetical magnetite grains larger than the critical size threshold for single domain behavior, yet also difficult to demagnetize), derived by Stacey and Banerjee (1974). Evidence from theoretical studies in micromagnetics demonstrates that the spin orientations in such grains are too complex to permit ready prediction of the magnetic moments. However, this limitation in the theory may be overcome by experiments involving rare earth-cobalt alloys and yttrium iron garnet crystals; these studies have suggested that surface anisotropy is the predominant cause of the high coercivity of pseudo-single domain grains.
Document ID
19780039889
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Banerjee, S. K.
(Minnesota, University Minneapolis, Minn., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
Solid-State Physics
Accession Number
78A23798
Funding Number(s)
CONTRACT_GRANT: NSF OCE-76-15255
CONTRACT_GRANT: NGR-24-005-248
CONTRACT_GRANT: NSF DES-75-21796
Distribution Limits
Public
Copyright
Other

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