TetrahedralFe2+in Nb-Doped Yttrium Iron Garnet Detected by the Angular Variation of Induced Anisotropy

Abstract
The presence of Fe2+ ions in tetrahedral sites of iron garnets has been detected for the first time. The particular material in which this occurred was flux-grown Nb-doped yttrium iron garnet. Proof of occupancy of tetrahedral sites by Fe2+ ions was obtained by Tucciarone's recently developed method of the angular variation of induced anisotropy.