Aluminum substitution in Ba/sub 2/YCu/sub 3/O/sub 7/

Journal Article · Tue Dec 01 04:00:00 EST 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.36.8365· OSTI ID:5679765

Siegrist, T; Schneemeyer, L F; Waszczak, J V; Singh, N P; Opila, R L; Batlogg, B; Rupp, L W; Murphy, D W

We have investigated the effect of aluminum incorporation on the structure and superconducting transition temperature of single crystals of high-T/sub c/ cuprate perovskite superconductors. The use of alumina crucibles for crystal growth results in incorporation of aluminum to varying extents in crystals of composition Ba/sub 2/YCu/sub 3-//sub x/Al/sub x/O/sub 7/, x = 0--0.22. We have performed x-ray studies on several crystals to determine structural effects of Al incorporation. We find that aluminum substitutes only for copper atoms in the chains. Superconducting transition temperatures, T/sub c/ determined by dc diamagnetic susceptibility measurements change only slightly, to approx.80 K for x = 0.1, then drop sharply with higher aluminum concentrations. Results are discussed in relation to the importance of the CU-O chains and oxygen stoichiometry to superconductivity in Ba/sub 2/YCu/sub 3/O/sub 7/.

• Research Organization: ATandT Bell Laboratories, 600 Mountain Avenue, Murray Hill, New Jersey 07974
• OSTI ID: 5679765
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:16; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
ANNEALING
BARIUM COMPOUNDS
COHERENT SCATTERING
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUXMETERS
HEAT TREATMENTS
IMPURITIES
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETOMETERS
MATERIALS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
MONOCRYSTALS
ORTHORHOMBIC LATTICES
PHYSICAL PROPERTIES
SCATTERING
SQUID DEVICES
SUPERCONDUCTING DEVICES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS