Journal ArticleDOI
Studies on simultaneous substitution of Pb and Y in Bi2Sr2CaCu2O8+δ single crystals
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TLDR
In this article, the effect of simultaneous substitution of Pb for Bi and Y for calcium in Bi 2 Sr 2 CaCu 2 O 8+ δ has been studied for x = 0 to 5.Abstract:
The effect of simultaneous substitution of Pb for Bi and Y for calcium in Bi 2 Sr 2 CaCu 2 O 8+ δ has been studied. Phase pure single crystals of Bi 1.7 Pb 0.3 Ca 1− x Y x Cu 2 O 8+ δ has been grown for x = 0 to 5. Variation in lattice parameters and the change in superconducting transition temperature for different x values has been studied. The optical micrograph revealed the layer growth mechanism and occurrence of some growth twins which are not removed even after annealing. Chemical etching with a bromide-ethanol solution revelaed elongated diamond shaped etch pits reflecting the orthorhombic symmetry of the crystal.read more
Citations
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Growth and characterization of Ce and Nb doped barium strontium titanate single crystals
TL;DR: In this article, single crystals of cerium and niobium doped barium strontium titanate were grown by high-temperature solution growth technique, and the growth parameters were optimized to grow large size (8 × 7 × 3 mm 3 ) good quality crystals.
Journal ArticleDOI
Nb:BST : Crystal growth and ferroelectric properties
TL;DR: In this paper, Nb substituted barium strontium titanate single crystals were grown by the high-temperature solution growth technique with different Nb concentrations, and the growth conditions were optimized to grow good quality large sized single crystals.
Journal ArticleDOI
Oxygen excess in Bi-2212: study of a Pb-substituted compound
TL;DR: In this paper, a systematic quantitative investigation of oxygen excess in polycrystalline Bi 1.8 Pb 0.2 Sr 2 CaCu 2 O 8+ δ as a function of temperature and oxygen partial pressure (P O 2 ) has been achieved.
References
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Journal ArticleDOI
Crystal substructure and physical properties of the superconducting phase Bi4(Sr,Cr)6Cu4O16+x.
Jean-Marie Tarascon,Y. Le Page,P. Barboux,B. G. Bagley,Laura Greene,W. R. McKinnon,G. W. Hull,M. Giroud,D. M. Hwang +8 more
TL;DR: A high-T/sub c/ phase in the Bi-Sr-Ca-Cu-O system of composition with similarities to both the oxygen-defect perovskites YBa/sub 2/Cu/sub 3/O/sub 7/..sqrt../sub x/ is isolated and the Meissner effect is due to a superconducting transition.
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Growth and properties of oxygen- and ion-doped Bi 2 Sr 2 CaCu 2 O 8+δ single crystals
TL;DR: Synthese et caracterisation des monocristaux dopes, le dopage par des ions provoque de petits changements de la transition supraconductrice pour les niveaux de substitution inferieurs a 20-25%.
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Thermomechanical detwinning of superconducting YBa2Cu3O7−x single crystals
TL;DR: In this article, a method for the complete removal of twins from single crystals of superconducting YBa2Cu3O7−xis described. The process depends on ferroelastic behavior found to exist in the phase, and should be generally applicable to the layered perovskite type phases containing accommodation twins resulting from a tetragonal-to-orthorhombic transformation on cooling.
Journal ArticleDOI
Preparation and characterization of the Ga doped Bi-Sr-Ca-Cu-O system
TL;DR: In this article, the preparation and characterization of the 2212 phase in the Bi2Sr1.7CaGaxCu2−xOy system prepared by a solid state reaction is reported.
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The high temperature transition and enhanced Tc (R=0) in Bi1.6Pb0.4Sr2Ca1Cu2O8+x
TL;DR: In this paper, a high-temperature superconducting transition around 120 K and enhanced Tc (R=0) were obtained in bulk polycrystalline Bi1.6Pb0.4Sr2Ca1Cu2O8+x samples.