Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1981-06-18
1984-03-06
Robinson, Ellis P.
Stock material or miscellaneous articles
Composite
Of inorganic material
156DIG63, 252 6257, 365 33, 428692, 428700, 428702, 428900, G11C 1102, C04B 3550
Patent
active
044354843
ABSTRACT:
A device for propagating magnetic domains includes a monocrystalline nonmagnetic substrate of a rare earth gallium garnet bearing a layer of an iron garnet capable of supporting local enclosed magnetic domains. The iron garnet layer is grown in compression on a (100) face of the nonmagnetic substrate. The iron garnet comprises manganese in part of the iron sites of its crystal lattice, and comprises yttrium and at least one representative selected from the group comprising bismuth and the rare earth metals in the dodecahedral lattice sites. Such a magnetic garnet has a very high uniaxial anisotropy and a high domain mobility. These properties make the device extremely suitable for propagating submicron magnetic domains having diameters as small as 0.4 .mu.m.
REFERENCES:
patent: 3745046 (1973-07-01), Mee et al.
patent: 4018692 (1977-04-01), Akselrad et al.
patent: 4138530 (1979-02-01), Breed et al.
"Properties and Device Applications of Magnetic Domains in Orthoferrites," A. H. Bobeck, The Bell Sys. Tech. J., Oct. 1967, pp. 1901-1925.
Breed Dirk J.
Robertson John M.
Van Bakel Bernardus A. H.
Voermans Antonius B.
Robinson Ellis P.
Schechter Marc D.
U.S. Philips Corporation
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