Rao, T Durga and Kandula, Kumara Raja and Asthana, Saket
(2018)
Evidence of suppressed oxygen vacancies in Sm and Sc co-substituted BiFeO3.
AIP Conference Proceedings, 1953.
pp. 1-5.
ISSN 0094-243X
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Abstract
BiFeO
3
(BFO) is well known room temperature multiferroic among all perovskite kind multiferroics. It shows
very high ferroelectric Curie temperature
T
C
= 1103 K and Neel temperature
T
N
= 643 K [1]. The coupling between
spin and charge in it would have
an additional degree of freedom of changing magnetization by electric field and vice
versa. However, the presence of oxygen vacancies and Fe
2+
/Fe
3+
ions lead to the leakage current which limits the
potential of BFO in device applications [2]. It has been
found that substitution of elements at
A
-
site and/or
B
-
site is
quite effective to tackle these issues and to improve the physical properties. It is reported that
A
-
site substitution by
rare earth is quite effective in tuning the properties of BFO [2]. In a
ddition to this, substitution of Sc at
B
-
site reduces
the leakage current and improves the insulating character of BFO [3]. It can be anticipated that co
-
substitution of Sm
at
A
-
site and Sc at
B
-
site would improve the insulating character by reducing the l
eakage currents and enhances the
physical properties of BFO.
In this work, polycrystalline BFO and Bi
0.85
Sm
0.15
Fe
0.90
Sc
0.10
O
3
(BSFSO) compounds were synthesized and their
structural, dielectric and electrical properties were analyzed.
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