Abstract
The effective magnetic fields at the Fe57 nuclei in the octahedral and tetrahedral sub-lattices of the tin-substituted YIG, Y3–xCaxFe5–xSnxO12(0.0⩽x⩽2.0) were investigated by the Mössbauer method. The dependence of Heff on x obtained from the experimental results is compared with the correspondent dependence of the magnetic moments of the Fe3+ ions derived from the Gilleo theoretical model. The reasons for the difference in the concentration dependence of Heff and the magnetic moment for the a-sub-lattice are discussed.
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