Relaxor-like ferroelectric behaviour favoured by short-range B-site ordering in 10% Ba2+ substituted MgFe2O4
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Date
2016-01-07T11:35:59Z
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Abstract
Using the molten salt method, pristine and Ba2+ substituted MgFe2O4 are prepared. The relaxor-like
behaviour observed in the dielectric dispersion indicates the existence of B-site short-range ordering
with the local P4122/P4322 symmetry which is confirmed by the Raman spectroscopy. The paper further
analyses the origin of polarization using Maxwell–Wagner fit and Nyquist plot. This work suggests a
possible way to increase the relaxor-like ferroelectric ordering, larger span of relaxation temperature
(DTm) and the effective masking of electronic contribution by the substitution of Ba2+ ion.
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Keywords
Magnetic materials, Impedance spectroscopy, Raman spectroscopy, Dielectric properties, Ferroelectricity