Journal ArticleDOI
Electrical Investigations of Aurivillius Type Sr0.7A0.3Bi2Nb2O9 (A = Ca, La and Pb) Ferroelectric Ceramics
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TLDR
In this paper, the effects of 30 atomic % doping of Ca, La and Pb on tetragonal strain, conductivity and dielectric constant/loss with temperature and frequency were discussed.Abstract:
Aurivillius type bismuth layer structured ferroelectrics (BLSF) have been found to possess strong relationship between tetragonal strain (c/a) and extrinsic/ intrinsic conductivity. The extrinsic part of the conductivity is known to depend upon space charge in the sample. The present paper discusses effects of 30 atomic % doping of Ca, La and Pb on tetragonal strain, conductivity and dielectric constant/loss with temperature and frequency. Tetragonal strain increases on doping calcium and lead while it shows a decrease on doping lanthanum. The calcium and lanthanum doped samples show pronounced space charge part of dielectric constant while lead doped sample shows nearly constant permittivity values. No phase transition is observed in the calcium doped sample up to 600°C while for the lanthanum doped sample a decrease of 141°C is observed in the value of Curie temperature compared to that for the undoped sample.read more
Citations
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Synthesis and ferroelectric properties of bismuth layer-structured (Bi7−xSrx)(Fe3−xTi3+x)O21 solid solutions
TL;DR: In this article, a single-phase Bismuth layer-structured (Bi 7− x Sr x )(Fe 3− x Ti 3+ x )O 21 (BSFT) ceramics were synthesized and the ferroelectric properties and crystal structure were investigated.
Journal ArticleDOI
Structural, Dielectric and Ferroelectric Studies of Molybdenum Substituted Sr2Bi2Nb2O9 Ferroelectric Ceramics
TL;DR: In this article, X ray diffraction analysis reveals the formation of single phase perovskite structure of SBNs and a slight change in the lattice parameters is observed.
Journal ArticleDOI
Highly a-oriented growth and enhanced ferroelectric properties of Bi3TaTiO9 thin films
Yoon Mo Ahn,Jong Yeog Son +1 more
TL;DR: In this article , the authors examined the strain-induced ferroelectric properties of Bi3TaTiO9 (BTTO) thin films and showed that the BTTO thin film on the single crystal Rh and Nb-doped SrTiO3 (Nb:STO) substrates via a pulsed laser deposition were compared.
Proceedings ArticleDOI
Dielectric and electrical studies of SrBi 2 Nb 1.9 V 0.1 O 9 ferroelectric ceramics
TL;DR: In this article, the effect of sintering temperature on structural, dielectric and electrical properties of vanadium substituted strontium bismuth niobate ferroelectric ceramics have been studied.
References
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Journal ArticleDOI
Ferroelectric films and devices
TL;DR: In this article, the temperature-dependent dielectric behavior of (Ba, Sr)TiO 3 films as a function of strain, composition, and thickness was studied and a direct link between the thin film and bulk electrical properties was made.
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Structural and electrical studies in La-substituted SrBi2Nb2O9 ferroelectric ceramics
TL;DR: In this article, structural and electrical studies of A-site lanthanum-substituted Sr1−xLaxBi2Nb2O9; x = 0.0, 0.4 and 0.5 samples are reported.
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Preparation and Properties of SrBi2Ta2O9Ceramics II
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Structural distortion and phase transition studies of Aurivillius type Sr1−xPbxBi2Nb2O9 ferroelectric ceramics
TL;DR: In this article, the effects of lead doping on the lattice response and phase transitions of ferroelectric ceramics are reported, and it is observed that structure attains more tetragonality with doping.
Journal ArticleDOI
Origin of ferroelectricity in perovskites: The principal problems from a theoretical perspective
TL;DR: In this article, the origin of ferroelectric phase transitions in oxides is explained by softening of the short-range repulsions by covalent hybridization so that the atoms can move off-center and towards each other.