Comparison of Electrical and Dielectric Properties of BLSF Materials in Bi─Fe─Ti─O and Bi─Mn─Ti─O Systems

• Published in: Ferroelectrics Vol. 332; no. 1; pp. 57 - 63
• Main Authors: Suresh, M. B., Ramana, E. Venkata, Babu, S. Narendra, Suryanarayana, S. V.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: London Taylor & Francis Group 01-04-2006; Taylor and Francis
• Subjects: BLSF materials; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Conductivity of specific materials; dielectric constant; Dielectric properties of solids and liquids; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Electronic transport in condensed matter; Exact sciences and technology; Insulators; Magnetic properties and materials; Magnetomechanical and magnetoelectric effects, magnetostriction; Physics; pyroelectric; synthesis; Electrical conductivity; Layered crystals; Dielectric properties; BLSF materials; synthesis; Titanates; Perovskites; Pyroelectricity; Aurivillius phase; Ferroelectricity; Synthesis; Magnetoelectric effects; Sublattices; Crystallographic site; dielectric constant; pyroelectric; Permittivity
• ISSN: 0015-0193; 1563-5112
• DOI: 10.1080/00150190500324709

Compounds having the BLSF structure are interesting in view of their ferroelectric properties and also various applications. These are Aurivillius phases having the general formula (Bi
2
O
2
)
2+
(A
n−1
B
n
O
3n+1
)
2−
where A represent the 12-fold coordinated cation with low valancies in the perovskite sub lattice; B denotes the octahedral site having ions of high valancies and n is the number of perovskite layers between the (Bi
2
O
2
)
2+
layers along the c-axis. A number of compounds in the system Bi─Fe─Ti─O have been synthesized in our laboratory and studied earlier for their electrical, dielectric, magnetic and magnetoelectric properties. By replacing Fe with Mn, we have synthesized Bi
5
MnTi
3
O
15
, Bi
6
Mn
2
Ti
3
O
18
, Bi
7
Mn
3
Ti
3
O
21
, Bi
8
Mn
4
Ti
3
O
24
and Bi
9
Mn
5
Ti
3
O
27
. These compounds have been studied for their structure, electrical, dielectric and pyroelectric properties. This paper reports the data on the physical properties of Mn containing compounds and a comparison is made with those similar compounds having Fe.