Journal ArticleDOI
Study of low temperature-dependent structural, dielectric, and ferroelectric properties of BaxSr(1−x)TiO3 (x = 0.5, 0.6, 0.7) ceramics
TLDR
In this article, the phase transformation temperature of sintered pellets of barium strontium titanate, BaxSr(1−x)TiO3 (BST) with different compositions were carried out as a function of temperature in the range 35-297 K.Abstract:
Dielectric studies of sintered pellets of barium strontium titanate, BaxSr(1−x)TiO3 (BST) with different compositions (x = 0.5, 0.6, 0.7) were carried out as a function of temperature in the range 35–297 K. The phase transformation temperature of cubic (paraelectric), tetragonal (ferroelectric), rhombohedral (ferroelectric), and orthorhombic (ferroelectric) phases of the BST ceramics with different strontium contents has been determined. The dielectric properties of the BaxSr(1−x)TiO3 pellets have revealed that Curie temperature decreased on replacing Ba by Sr. The Curie temperatures of Ba0.5Sr0.5TiO3, Ba0.6Sr0.4TiO3, and Ba0.7Sr0.3TiO3 were found to be 245 K, 260 K, and 285 K, respectively. Further, cubic, tetragonal, orthorhombic, and rhombohedral phases were observed for the BST pellets with x = 0.5, 0.6, 0.7 in the low temperature range of 35–297 K. The dielectric studies revealed higher dielectric constant and low dielectric loss for Ba0.6Sr0.4TiO3 sample than that of other compositions of the BST. Polarization–electric field (P–E) hysteresis loop measurements for Ba0.6Sr0.4TiO3 ceramic pellet was carried out with different applied electric fields in the range 1.39 to 4.86 kV/cm and in the temperature range of 108–323 K to study the variation in remanent polarization (Pr), saturated polarization (Ps), and coercive field (Ec). The saturated polarization and remanent polarization were found to increase steadily up to the temperature of 165 K and to decrease drastically at about 323 K as a consequence of ferroelectric to paraelectric transition.read more
Citations
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Journal ArticleDOI
Comprehensive characterization of Ba1−xSrxTiO3: Correlation between structural and multifunctional properties
TL;DR: In this article, the structural, vibrational, optical and dielectric properties of the synthesized materials were characterized extensively throughout the work and the activation energy, calculated from dielectrics characterizations, was found to be ~1 eV suggesting the governance of doubly ionized oxygen vacancy for conduction and relaxation mechanism.
Journal ArticleDOI
Lead-free ferroelectric barium titanate -based thin film for tunable microwave device application
TL;DR: In this article, the microstructure and dielectric respones of the Pt/BSZT/Pt thin film capacitors were investigated in detail, and it was shown that BSZT thin films were well crystallized in tetragonal perovskite structure with a random crystal orientation at rather low temperature of 650 °C.
Journal ArticleDOI
Unraveling the relationship between bulk structure and exposed surfaces and its effect on the electronic structure and photoluminescent properties of Ba0.5Sr0.5TiO3: A joint experimental and theoretical approach
Weber Duarte Mesquita,Marisa C. Oliveira,Marcelo Assis,Marcelo Assis,Renan Augusto Pontes Ribeiro,Ariadne C. Eduardo,Marcio D. Teodoro,Gilmar E. Marques,Mario Godinho Junior,Elson Longo,Maria Fernanda do Carmo Gurgel +10 more
TL;DR: In this article, a combined experimental and theoretical investigation of bulk and (001) surface properties of a Ba 0.5Sr0.5TiO3 material synthesized by the polymeric precursor method was conducted.
Journal ArticleDOI
CoGdXFe2−XO4 (0.00 ≤ X ≥ 0.08) nanoferrites: effect of Gd3+ ions on structural, optical, magnetic, and dielectric properties
Akila Rajeshwari,I. Kartharinal Punithavathy,S. Johnson Jeyakumar,M. Jothibas,S. Ajith Kumar +4 more
Journal ArticleDOI
Low-frequency internal friction in ferroelectric Ba0.8Sr0.2TiO3 and Ba0.8Sr0.2TiO3 + 0.2 mass. % La ceramics
TL;DR: In this article, the temperature dependences of internal friction and Young's modulus in ferroelectric Ba0.8Sr0.2TiO3 ceramics under bending oscillations were investigated at frequencies of the several hertz.
References
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Journal ArticleDOI
Dielectric properties of fine‐grained barium titanate ceramics
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Journal ArticleDOI
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