Spin-reorientation and magnetic anisotropy in ilmenite MnTi(Fe)O3 system

The polycrystalline MnTi<inf>1-x</inf>Fe<inf>x</inf>O<inf>3</inf> with x = 0.01, 0.02, 0.03, 0.04 and 0.05 were prepared by solid state reaction method and obtained Ilmenite structure of hexagonal symmetry with space group R3¯ from Rietveld refinement of room temperature X-ray diffraction. In order to reveal the materials disorder/defects, the materials surface morphology and its elementary identification in atomic weight percentage were investigated through SEM and EDX data respectively. Then XPS data were analysed for the valence state of Mn, Ti and Fe ions to elucidate the low temperature experimental magnetic behaviour. Using these, the temperature dependent dc magnetization has been explained by Curie-Weiss law and normalized susceptibility which implies long-range interactions with canted-spin. Subsequently, M(H) behaviour is taken in to consideration and confirmed the existence of spin reorientation (SR) with possible spin-glass like features at low temperatures in these materials.