Abstract
Crystals of the general composition {Y3−2xCa2x} [Fe2−yIny] (Fe3−xVx)O12 were grown by the PbO flux method. Electron microprobe studies revealed zoning patterns of varying x within these crystals, while the indium content was found uniform among all crystals from the same crucible. Average x and y was determined by measuring the saturation magnetization Ms and the Curie temperature. Three series of crystals were produced with y=0, 0.11 and 0.35, and x ranging from 0.19 to 0.82. Ferrimagnetic resonance between 4 and 300 K yielded the anisotropy constants K1 and K2. These single-crystal data were supplemented by the results of line-shape analysis of polycrystalline samples with low Ms. At T=0, | K1 (x) | is nonlinear with a maximum at x≈0.2. The reduced temperature dependence of the reduced anisotropy field was found independent of composition.
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