Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1991-11-08
1994-09-06
Thibodeau, Paul J.
Stock material or miscellaneous articles
Composite
Of inorganic material
427127, 427129, 427130, 428694GT, 428694ML, 428703, 430945, B32B 900
Patent
active
053447204
ABSTRACT:
A bistable single crystal magneto-optic film of preselected coercivity is described. The film is readily switchable and is characterized by a substantially square shaped hysteresis loop. The film properties are attributed to controlled introduction in the film of defects of predetermined size and distribution. Defects of from about 0.4 .mu.m to about 4.0 .mu.m present in numbers per cm.sup.2 of from about 10 to about 10.sup.6, with optimal distribution falling in the range of from about 100 to about 1000, are described. Also described are methods of achieving the required defect size and distribution utilizing procedures such as ion bombardment, particle abrasion/deposition, laser ablation or annealing of the film or substrate upon which the film is supported. Devices in which the films can be used to advantage, such as flaw detecting, imaging and microwave processing, are described.
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NERAC Reports 487-498, Nov. 22, 1990.
NERAC Report 13, Nov. 26, 1990.
Belt Roger F.
Ings John B.
Follett R.
Litton Systems Inc.
Thibodeau Paul J.
Wallach Michael H.
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