Superconducting phase transitions in the La-M-Cu-O layered perovskite system, M = La, Ba, Sr, and Pb

Journal Article · Tue Mar 31 23:00:00 EST 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.35.5350· OSTI ID:6093512

Gubser, D U; Hein, R A; Lawrence, S H; Osofsky, M S; Schrodt, D J; Toth, L E; Wolf, S A

We report results of our studies of the La-Mu-Cu-O system, M = La, Ba, Sr, and Pb. T/sub c/ and the magnetic moment are correlated with annealing schedules and x-ray structural analyses. The occurrence of superconductivity is associated with the formation of Cu/sup 3+/ ions producing an expansion of the c parameter of the unit cell. We have found magnetic and resistive anomalies throughout near 65 K in some La-Ba-Cu-O samples. These samples show a slight depression of the superconducting transition temperature.

• Research Organization: Naval Research Laboratory, Washington, D.C. 20375-5000
• OSTI ID: 6093512
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Journal Issue: 10 Vol. 35:10; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LEAD COMPOUNDS
LEAD OXIDES
MAGNETIC MOMENTS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VERY LOW TEMPERATURE