STUDY OF SINGLE-CRYSTAL FE2TIO4 BY THE MEASUREMENT OF MAGNETIZATION AND MOSSBAUER-SPECTRA

A single crystal of Fe2TiO4 was grown with an infrared ray image furnace and its magnetization and Mössbauer spectra were measured. In a specimen squeezed along [001], we found that, at 77 K, the tetragonal axis and the spontaneous moment are fixed along [001], with a slight deviation in (110) or (110) plane (about 10∼20°) for the moment. In Mössbauer measurement, it was observed that the sharpness of the spectrum was largely affected by the domain distribution. We found several peaks which is ascribed to a special group of Fe2+ ions. We conclude that the E.F.G.Z axis of these Fe2+ ions is vertical to the hyperfine magnetic field Hn and they are on B sites with 3d electron orbitals spreading like that of dɛyz or dɛzx. © 1979, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.