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NdFeO3 modified polycrystalline ceramics with composition(NdFeO3)0.1-(Ba0.7Sr0.3TiO3)0.9 (NFBST) ceramics have been synthesized viasolid-state reaction route. The Rietveld refinement of the XRD data confirmedthe existence of a tetragonal phase (P4mm) and a hexagonal phase (P63/mmc) inthe prepared sample. The coexistence of phases has been also further confirmedfrom the Raman spectroscopy. The SEM image revealed dense microstructure withwell packed grains of different sizes. At room temperature lossy P-E loop andweak ferromagnetism is observed in NFBST system. Complex impedance spectroscopy(CIS) as a function of frequency (100 Hz to 1 MHz) at different temperatures(RT to 700K) has been employed to study the electrical behaviour in NFBSTceramic. Two semicircular arcs in the Cole-Cole plot manifested the grain andgrain boundary contribution in overall impedance. The detail complex modulusanalysis and ac fitted conductivity data authenticated correlated barrierhopping CBH to be responsible for electrical as well as conduction phenomena inNFBST. Oxygen vacancies are responsible for relaxation and conduction processesin NFBST ceramics as divulged from the activation energy values estimated fromelectrical impedance, modulus, and conductivity data.

Structural, Electrical, Magnetic and Impedance Behaviour of NdFeO3 Modified Ba0.7Sr0.3TiO3 Ceramics