Enhanced electric property and magneto-capacitance co-efficient co-related with modulated Raman spectroscopy of GaFeO3 in (GaFeO3)0.50(Ni0.40Zn0.40Cu0.20Fe2O4)0.50

Multiferroic (MF) nanoparticles of GaFeO3 (GFO) were prepared by sol–gel method. To modulate the magneto-dielectric property, nanoparticles of GFO are incorporated in Ni0.40Zn0.40Cu0.20Fe2O4 (NZCF). Crystallographic phases of all the samples are confirmed by analyzing the X-ray diffractograms using FULLPROF program. The hysteretic behavior observed in the polarization vs. electric field loops recorded at room temperature (RT) confirmed the ferroelectric ordering of GFO and (GaFeO3)0.50(Ni0.40Zn0.40Cu0.20Fe2O4)0.50 (GFO-NZCF). Temperature dependent dielectric constant of GFO and GFO-NZCF shows the ferroelectric to paraelectric transition at 625 and 680 K, respectively. The dielectric constant measured in presence and absence of magnetic field confirmed that the samples are MFs with positive magneto-capacitance (MC) co-efficient. Interestingly, electric polarization and MC co-efficient of GFO are increased in GFO-NZCF. Room temperature Raman spectra of GFO and NZCF have been compared with that of GFO-NZCF and the observed changes have been co-related with the enhanced polarization of GFO-NZCF.