Abstract
The effect of tetravalent Ti
+4 substitution in Mg
0.95Mn
0.05Fe
2O
4 on its magnetic and electrical properties has been studied using X-ray diffraction, Mössbauer spectroscopy, isothermal dc magnetization and dielectric measurements. X-ray diffraction studies have shown the structural transformation from cubic to tetragonal with the Ti
+4 substitution. The Mössbauer spectra of Mg
0.95Mn
0.05Fe
1.0Ti
1.0O
4 recorded in the temperature range 20–300 K shows the presence of the magnetic as well as quadrupole interactions. The isothermal hysteresis loop infers that the system exhibits a ferrimagnetic ordering at room temperature. The Zero-field-cooled (ZFC) and field-cooled (FC) magnetization studies support ferrimagnetic ordering of Mg
0.95Mn
0.05Fe
1.0Ti
1.0O
4 at room temperature. Signatures of ferroelectric transition have been observed in the temperature range 200–300 K from dielectric measurements. The observed magnetic and dielectric behaviour indicate that this material exhibits multiferroic behaviour.