Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1978-06-22
1981-04-21
Silverman, Stanley S.
Stock material or miscellaneous articles
Composite
Of inorganic material
252 6257, 252 6258, 365 33, 428900, G11C 1102
Patent
active
042633745
ABSTRACT:
In the preferred embodiment, a monocrystalline film of substituted yttrium iron garnet (YIG) deposited on a <11> oriented gadolinium gallium garnet (GGG) substrate is formulated so that the temperature variation of the ferromagnetic resonance frequency of the film has an ordinary minimum. For a range of temperature variations about the temperature at which the minimum occurs, therefore, the resonance frequency of the film is relatively insensitive to variations in temperature. This minimum is believed to occur where the temperature variations of the demagnetizing effect and the temperature variations of anisotropy effects more or less counterbalance each other. The counter-balancing effects are brought within range of each other primarily by the substitution of gallium or aluminum for iron and substitution of lanthanum for yttrium in the substituted YIG. Gallium or aluminum reduces the temperature drift of the saturation magnetization. Lanthanum adjusts the misfit stress and thus the anisotropy effects.
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Glass et al., Temperature Stabilization of Ferrimagnetic Resonance Field in Epitarial YIG, by, Ga, La, Substitution, Pergamon Press, 5/1977.
Elliott Michael T.
Glass Howard L.
Henry Rodney D.
Friedman Gilbert H.
Hamann H. Frederick
Rockwell International Corporation
Silverman Stanley S.
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