Mo¨ssbauer spectra and magnetic anisotropy of garnet crystal BiCaInVIG

Abstract

The position of ln3+ ions in garnet single crystals of composition {Bi0.4Ca2.6} [Fe2-yln y ] (Fe1.7V1.3)O12(y < 0.15) was qualitatively determined by the Mo¨ssbauer spectroscopy method. According to the single-ion model, the Fe3+ ions on octahedral and tetrahedral sites provided about the same contribution for the magnetic anisotropy of single-crystal BiCaVIG (K 1 a V =-0.0125 cm-1, K 1 d V =0.0127 cm-1 for y = 0) and BiCaInVIG (K 1 a In = -0.0024 cm-1, K 1 d In =-0.002 cm-1, for y=0.144) at room temperature.