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High Curie temperature drive layer materials for ion-implanted magnetic bubble devicesIon implantation of bubble garnets can lower the Curie temperature by 70 C or more, thus limiting high temperature operation of devices with ion-implanted propagation patterns. Therefore, double-layer materials were made with a conventional 2-micron bubble storage layer capped by an ion-implantable drive layer of high Curie temperature, high magnetostriction material. Contiguous disk test patterns were implanted with varying doses of a typical triple implant. Quality of propagation was judged by quasistatic tests on 8-micron period major and minor loops. Variations of magnetization, uniaxial anisotropy, implant dose, and magnetostriction were investigated to ensure optimum flux matching, good charged wall coupling, and wide operating margins. The most successful drive layer compositions were in the systems (SmDyLuCa)3(FeSi)5O12 and (BiGdTmCa)3(FeSi)5O12 and had Curie temperatures 25-44 C higher than the storage layers.
Document ID
19840044251
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Fratello, V. J.
(Bell Telephone Labs., Inc. Murray Hill, NJ, United States)
Wolfe, R.
(Bell Telephone Labs., Inc. Murray Hill, NJ, United States)
Blank, S. L.
(Bell Telephone Labs., Inc. Murray Hill, NJ, United States)
Nelson, T. J.
(Bell Telephone Laboratories, Inc. Murray Hill, NJ, United States)
Date Acquired
August 12, 2013
Publication Date
March 15, 1984
Publication Information
Publication: Journal of Applied Physics
Volume: 55
ISSN: 0021-8979
Subject Category
Solid-State Physics
Accession Number
84A27038
Funding Number(s)
CONTRACT_GRANT: F33615-81-C-1404
Distribution Limits
Public
Copyright
Other

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