|Electrical Studies on Bi4NdTi3Fe0.7Co0.3O15-Bi3NdTi2Fe0.7Co0.3O12?
Intergrowth Aurivillius Ceramics
|Vadla Veenachary,1 Eskilla Venkata Ramana,2 Gobburu Subramanya Kumar,1 Guduru Prasad1
and Nandiraju Venkata Prasad1, *
Pages : 113-119
DOI : 10.1080/0371750X.2020.1760139
|A promising Aurivillius layered pervoskite ceramics, namely, the title compound
has drawn interest in recent days owing to its figure of merit (magnetoelectric
coupled properties). General formula of the compound is expressed as
(Bi2O2)2+(An1BnO3n+1)2, where A represents Bi/Nd and B represents Ti/Fe/Co.
However, no reports are available on impedance measurement of this compound.
In the present study, four-layered (Bi4NdTi3Fe0.7Co0.3O15) and three-layered
(Bi3NdTi2Fe0.7Co0.3O12?) compounds were synthesized by solid state reaction
method and an intergrowth ceramics of three-layered and four-layered compound
(title compound) was prepared. XRD pattern confirmed the intergrowth compound
as single phase eight-layered compound. Dielectric data of the compounds were
recorded as function of temperature at various frequencies. The intergrowth
sample showed high dielectric and remnant polarization (Pr) values. From the
combined impedance spectroscopic and AC conductivity (?ac) plots, the respond
function was found to be frequency dependent, indicating the conduction process
to be thermally activated. In the present study, an attempt was made to understand
the inheriting dielectric relaxations, and the results were corroborated to the
master (scaling) plots.
[Keywords: Aurivillius phases, Ferroelectrcis, Multiferroic materials, BLSF
|Full text : Subscribe to Download Full Text
| [Go Back]