G - Physics – 02 – F
Patent
G - Physics
02
F
G02F 1/09 (2006.01) C30B 33/00 (2006.01) G01N 27/82 (2006.01) G03G 19/00 (2006.01) H01F 10/24 (2006.01) G02F 1/00 (2006.01)
Patent
CA 2122264
2122264 9308984 PCTABS00021 A bistable single crystal magneto-optic film or 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 µm, present in numbers per cm2 of from about 10 to about 106, 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.
Belt Roger F.
Ings John B.
Ade & Company
Litton Systems Inc.
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