Moessbauer studies on some new magnetic oxides

Three new magnetic oxides have been synthesised, viz., Li2Fe3VO8, YFe3TiO8 and CaFe3VO8. XRD studies show that the first compound has a cubic symmetry of spinel type while the latter two show orthorhombic symmetry. All the three compounds are magnetic at room temperature, however, the first compound shows a large magnetic moment as compared to the other two. Their Moessbauer spectra at room temperature show distinct hyperfine split spectral lines. The present preliminary investigation indicates that the long range order is ferrimagnetic in Li2Fe3VO8 and CaFe3VO8 while in YFe3TiO8 it is more likely to be canted antiferromagnetic. (orig.)