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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