Ilmenite (FeTiO3) is an antiferromagnetic insulator with Néel temperature (TN) of 55 K. The magnetic structure of FeTiO3 is known to be easily frustrated by cation substitution. In the present study we tried to prepare the Ge-substituted FeTiO3. The samples were prepared by the conventional solid state reaction technique under the controlled oxygen pressure. Formation of a single phase of FeTi 1-xGexO3 with x=0.01 was confirmed by X-ray diffraction (XRD) method. The Ge-substituted FeTiO3 had a smaller lattice volume than that of un-doped one. SQUID magnetometer and Mössbauer spectroscopy measurements indicated that the Ge-substitution reduced the T N slightly. Moreover the magnetic hyperfine fields of Ge-substituted FeTiO3 seemed to be increased in spite of the decreased magnetic moments.
ASJC Scopus subject areas
- Physics and Astronomy(all)