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Transactions of the INDIAN CERAMIC SOCIETY   Vol. 80  2021
Investigation on Multiferroic Properties and Conduction Mechanism in Cobalt Doped Bi0.9Nd0.1FeO3 Solid Solutions
Anil Kumar,a Preeti Sharma,b Jaswinder Pal,c Anupinder Singh,d Rajender Singh Kundua and Rajesh Puniab,*
Pages : 142-149
DOI : 10.1080/0371750X.2021.1915874
Abstract
Bi0.9Nd0.1Fe1–xCoxO3 (x = 0.025, 0.050, 0.075 and 0.1) solid solutions have been synthesized by doping of Co3+ at the Fe3+ site using solid-state reaction method. The prepared solid solutions have been investigated for their structural, magnetic, ferroelectric and magneto-dielectric properties and conduction mechanism. The XRD study reveals that all the solid solutions possess a rhombohedral symmetry. The vibrating sample magnetometer study reveals that all the samples possess magnetic orders and the remnant magnetization has been found to be increased from 0.2388 emu/g for x = 0.025 to 0.7112 emu/g for x = 0.1. The non-Debye type dielectric relaxation has been investigated for all the samples. The frequency dependent ac conductivity data follows Jonscher’s Power law. Variation of exponent n versus temperature follows the overlapping large polaron tunneling conduction model. The maximum value of remanent polarization (~0.152 C/cm2) was found for x = 0.1. All the samples exhibit positive magneto-dielectric response in the low-frequency region with the highest magneto-capacitance value of 13.54% at 500 Hz for sample x = 0.1. [Keywords: BiFeO3, Magnetism, Ferroelectric, Conduction Mechanism, Magnetodielectric]
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