Study of the formation of the high-temperature superconducting phase in bismuth strontium calcium copper oxide (BiSrCaCu2Oy) by microwave absorption

1990 ◽  
Vol 94 (9) ◽  
pp. 3864-3868 ◽  
Author(s):  
Stephane. Cuvier ◽  
Micky. Puri ◽  
John. Bear ◽  
Larry. Kevan
Keyword(s):  
High Temperature ◽  
Copper Oxide ◽  
Microwave Absorption ◽  
Superconducting Phase ◽  
High Temperature Superconducting ◽  
Strontium Calcium Copper Oxide

X-ray powder diffraction data for the superconducting phase Tl0.5Pb0.5Sr2CaCu2O6.5+δ

1993 ◽  
Vol 8 (4) ◽  
pp. 249-250 ◽  
Author(s):  
Chan Park ◽  
Robert L. Snyder
Keyword(s):  
High Temperature ◽  
Molten Salt ◽  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Superconducting Phase ◽  
Powder Diffraction Data ◽  
X Ray ◽  
High Temperature Superconducting

The X-ray powder diffraction pattern for a sample of the high-temperature superconducting phase Tl0.5Pb0.5Sr2CaCu2O6.5+δ has been determined. The sample was prepared by a molten salt technique and had a Tc of 96 K.

Theoretical Studies of Copper Oxide Clusters: Prediction of an Electronically Driven Phase Separation in YBa2Cu3Ox

1987 ◽  
Vol 99 ◽  
Author(s):  
L. A. Curtiss ◽  
T. O. Brun ◽  
D. M. Gruen
Keyword(s):  
Phase Diagram ◽  
Phase Separation ◽  
High Temperature ◽  
Copper Oxide ◽  
Superconducting Phase ◽  
Oxygen Stoichiometry ◽  
Molecular Orbital Calculations ◽  
Theoretical Studies ◽  
Two Phases ◽  
Semi Empirical

ABSTRACTOn the basis of semi-empirical extended Hiickel molecular orbital calculations of copper-oxide clusters representing the new superconducting material YBa2Cu3Ox, a phase diagram is proposed which suggests that the 94 K high temperature superconducting phase of YBa2Cu3Ox is characterized by an oxygen stoichiometry near 7.0. The phase diagram predicts that a plateau should exist for Tc in the region x = 0.0 – 0.25 and that in this region two phases are present which are characterized by compositions having oxygen stoichiometries 6.5–6.75 and ca. 7.0.

High-temperature superconductivity in yttrium-barium-copper oxide: identification of a copper-rich superconducting phase

1987 ◽  
Vol 109 (8) ◽  
pp. 2528-2530 ◽  
Author(s):  
Angelica M. Stacy ◽  
John V. Badding ◽  
Margret J. Geselbracht ◽  
William K. Ham ◽  
Gary F. Holland ◽  
...  
Keyword(s):  
High Temperature ◽  
Yttrium Barium Copper Oxide ◽  
Copper Oxide ◽  
High Temperature Superconductivity ◽  
Barium Copper Oxide ◽  
Superconducting Phase ◽  
Barium Copper ◽  
Yttrium Barium

scholarly journals Comparison of Pr-doped Ca 122 and Ca 112 Pnictides by Low-field Microwave Absorption Spectroscopy

2014 ◽  
Vol 1684 ◽  
Author(s):  
Austin R. Howard ◽  
Jonathan D. Yuen ◽  
Bing Lv ◽  
Myron Salamon ◽  
Ching-Wu Chu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Microwave Absorption ◽  
Absorption Spectroscopy ◽  
Superconducting State ◽  
Superconducting Phase ◽  
Interfacial Phase ◽  
Low Field ◽  
Low Magnetic Field ◽  
Anisotropic Magnetization

ABSTRACTPraseodymium doped CaFe2As2 (122 structure) and CaFeAs2 (112 structure) are characterized by modulated Low Magnetic Field Microwave Absorption (LFMA) spectroscopy. In both (Pr,Ca)122 and (Pr,Ca)112 structures, a strong hysteretic LFMA is found, with a TcH of ∼30 K and ∼26 K, respectively. However, in (Pr,Ca)122, measurements also show an unusual Narrow Peak (NP) LFMA signal appearing at higher temperatures, above the lower TcH superconducting state until a TcNP of 49 K. We associate this NP LFMA with interfacial superconductivity, which has been found previously by highly anisotropic magnetization measurements. Furthermore, the absence of NP in (Pr,Ca)112 correlates with the absence of an interfacial phase. These results give useful information about the microwave signature of interfacial superconductivity present in the (Pr,Ca)122 system, and may form a roadmap towards a stabilized high temperature superconducting phase in pnictides.

Synthesis of a Bi2Sr2CaCu2Oy high-temperature superconducting phase with T c ° above 100 K

1997 ◽  
Vol 23 (6) ◽  
pp. 422-424
Author(s):  
Zh. M. Tomilo ◽  
N. A. Prytkova ◽  
E. M. Gololobov ◽  
D. M. Turtsevich
Keyword(s):  
High Temperature ◽  
Superconducting Phase ◽  
High Temperature Superconducting
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