Field dependent dielectric behaviour of BaTiO3, SrTiO3 and KTaO3 perovskites

Authors
Lingwal, DS Naithani, UC Kumar, A Semwal, BS
Citation
Ds. Lingwal et al., Field dependent dielectric behaviour of BaTiO3, SrTiO3 and KTaO3 perovskites, I J PA PHYS, 39(10), 2001, pp. 673-678
Citations number
22
Categorie Soggetti
Physics
Journal title
INDIAN JOURNAL OF PURE & APPLIED PHYSICS
ISSN journal
00195596 → ACNP
Volume
39
Issue
10
Year of publication
2001
Pages
673 - 678
Database
ISI
SICI code
0019-5596(200110)39:10<673:FDDBOB>2.0.ZU;2-Z
Abstract
The electric field dependence of the complex dielectric constant in anharmo nic ferroelectric crystals are calculated in its paraelectric phase from th e Silverman-Joseph Hamiltonian augmented with fourth order phonon co-ordina tes using double time Greens functions technique. The frequency, temperatur e and electric field dependent dielectric constant of BaTiO3. SrTiO3 and KT aO3 crystals have been discussed. Dielectric constant increases with increa se of applied field in BaTiO3, SrTiO3 and KTaO3 cases.