Title :
Coercivity of Bi-substituted garnet films for magneto-optic memory
Author :
Kleparski, G. ; Matveyev, S.N. ; Antonov, A.V. ; Starostin, Yu V. ; Chubarkenko, V.A.
Author_Institution :
Inst. of Control Sci., Acad. of Sci., Moscow, USSR
fDate :
9/1/1990 12:00:00 AM
Abstract :
The effect of grain size on coercivity in Bi-substituted polycrystalline garnet films is investigated. The coercive force is found to decrease with decreasing grain size in samples having single-domain-size grains. The decrease is especially dramatic for chemically deposited films. This effect is fairly well explained by thermal fluctuations of magnetization inside the grain. The results obtained make it possible to determine the optimal characteristics of such films for use in magnetooptic memory
Keywords :
Faraday effect; bismuth compounds; coercive force; dysprosium compounds; gadolinium compounds; garnets; grain size; magnetic domain walls; magnetic thin films; magnetisation reversal; magneto-optical devices; magneto-optical recording; sputtered coatings; Bi-substituted garnet films; BiDyGGIGSc5O12; BiDyGa5O12Fe5O12Sc5O12; BiGdAGIGSc5O12; BiGdAl5O12Fe5O12Sc5O12; GdGG substrate; GdGa5O12; chemical sedimentation; chemically deposited films; coercive force; domain wall movement; glass substrate; grain size effect; magnetisation reversal; magnetooptic memory; magnetooptical Faraday effect; magnetron sputtering; optimal characteristics; polycrystalline garnet films; scanning electron microscopy; thermal fluctuations; Chemicals; Coercive force; Garnet films; Glass; Grain size; Magnetic field measurement; Magnetooptic effects; Saturation magnetization; Substrates; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
