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Title: Potassium substitution for barium in RBa/sub 2/Cu/sub 3/O/sub 7/ (R = Y, Eu, Pr)

Abstract

The authors have studied the crystal structure, magnetic susceptibility, and oxygen concentration in single-phase samples of high T/sub c/RBa/sub 2-y/K/sub y/CU/sub 3/IO/sub x/ (where y = 0 to 1 for R = Y and Eu), and in nonsuperconducting PrBa/sub 2-y/K/sub y/Cu/sub 3/O/sub chi/ (y = 0 to 1.5). The YBa/sub 2-y/K/sub y/Cu/sub 3/O/sub chi/ samples all have the same orthorhombic structure and almost the same T/sub c/, even though chi = 6.1 for y = 1. EuBa/sub 2-y/K/sub y/Cu/sub 3/O/sub chi/ evolves from orthorhombic to tetragonal structure, and T/sub c/ progressively drops, with increasing y; for y = 1 it is no longer superconducting. The mixed-valent Pr in PrBa/sub 2/Cu/sub 3/O/sub 7/ becomes tetravalent in the presence of /Kappa//sup +/ ions substituted for Ba/sup ++/. The decrease in cation charge reduces both the oxygen concentration and the average valency of the Cu in all three systems.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Hebrew Univ., Jerusalem (Israel). Racah Inst. of Physics
OSTI Identifier:
5616665
Resource Type:
Journal Article
Journal Name:
Mod. Phys. Letters B; (United States)
Additional Journal Information:
Journal Volume: 2:5
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BARIUM OXIDES; CRYSTAL STRUCTURE; MAGNETIC SUSCEPTIBILITY; SUPERCONDUCTIVITY; COPPER OXIDES; SUPERCONDUCTORS; CHEMICAL COMPOSITION; PHASE STUDIES; YTTRIUM OXIDES; EUROPIUM; ORTHORHOMBIC LATTICES; OXYGEN; POTASSIUM IONS; PRASEODYMIUM; TETRAGONAL LATTICES; VACANCIES; VALENCE; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; COPPER COMPOUNDS; CRYSTAL DEFECTS; CRYSTAL LATTICES; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELEMENTS; IONS; MAGNETIC PROPERTIES; METALS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; POINT DEFECTS; RARE EARTHS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; 360202* - Ceramics, Cermets, & Refractories- Structure & Phase Studies; 656100 - Condensed Matter Physics- Superconductivity; 360204 - Ceramics, Cermets, & Refractories- Physical Properties

Citation Formats

Felner, I, Kowitt, M, Lehavi, Y, Edery, D, BenDor, L, Wolfus, Y, and Nowik, I. Potassium substitution for barium in RBa/sub 2/Cu/sub 3/O/sub 7/ (R = Y, Eu, Pr). United States: N. p., 1988. Web. doi:10.1142/S0217984988000394.
Felner, I, Kowitt, M, Lehavi, Y, Edery, D, BenDor, L, Wolfus, Y, & Nowik, I. Potassium substitution for barium in RBa/sub 2/Cu/sub 3/O/sub 7/ (R = Y, Eu, Pr). United States. doi:10.1142/S0217984988000394.
Felner, I, Kowitt, M, Lehavi, Y, Edery, D, BenDor, L, Wolfus, Y, and Nowik, I. Fri . "Potassium substitution for barium in RBa/sub 2/Cu/sub 3/O/sub 7/ (R = Y, Eu, Pr)". United States. doi:10.1142/S0217984988000394.
@article{osti_5616665,
title = {Potassium substitution for barium in RBa/sub 2/Cu/sub 3/O/sub 7/ (R = Y, Eu, Pr)},
author = {Felner, I and Kowitt, M and Lehavi, Y and Edery, D and BenDor, L and Wolfus, Y and Nowik, I},
abstractNote = {The authors have studied the crystal structure, magnetic susceptibility, and oxygen concentration in single-phase samples of high T/sub c/RBa/sub 2-y/K/sub y/CU/sub 3/IO/sub x/ (where y = 0 to 1 for R = Y and Eu), and in nonsuperconducting PrBa/sub 2-y/K/sub y/Cu/sub 3/O/sub chi/ (y = 0 to 1.5). The YBa/sub 2-y/K/sub y/Cu/sub 3/O/sub chi/ samples all have the same orthorhombic structure and almost the same T/sub c/, even though chi = 6.1 for y = 1. EuBa/sub 2-y/K/sub y/Cu/sub 3/O/sub chi/ evolves from orthorhombic to tetragonal structure, and T/sub c/ progressively drops, with increasing y; for y = 1 it is no longer superconducting. The mixed-valent Pr in PrBa/sub 2/Cu/sub 3/O/sub 7/ becomes tetravalent in the presence of /Kappa//sup +/ ions substituted for Ba/sup ++/. The decrease in cation charge reduces both the oxygen concentration and the average valency of the Cu in all three systems.},
doi = {10.1142/S0217984988000394},
journal = {Mod. Phys. Letters B; (United States)},
number = ,
volume = 2:5,
place = {United States},
year = {1988},
month = {1}
}