Magnetic field dependence of the specific heat of some high-T/sub c/ superconductors. [MLaCuO, YBaCuO (M = Sr, Ca)]

Conference · Fri May 01 04:00:00 EDT 1987

OSTI ID:5923478

Phillips, N E; Fisher, R A; Lacy, S E; Marcenat, C; Olsen, J A; Ham, W K; Stacy, A M

This paper investigates the effect of magnetic fields on the specific heat of some high-T/sub c/ superconductors. Measurements of specific heat, C, were made on samples of La/sub 2/CuO/sub 4-y/ (La1), La/sub 1.85/M/sub 0.15/CuO/sub 4-y/ (Ca1, Sr1, Sr2, Ba1 and Ba2) and YBa/sub 2/Cu/sub 3/O/sub 9-y/ (Y1). Meissner effect measurements were made in 12.5G. The high-temperature onset of a change in magnetic susceptibility, chi, was taken as T/sub c/, and the transition width, ..delta..T/sub c/, as the temperature interval of the 10 to 90% change in chi. Calculation of the fractional Meissner effect, -4..pi.. chi/sub V/, was based on the total sample volume, with chi/sub V/ corrected for demagnetizing effects. 5 refs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5923478
• Report Number(s): LBL-23531-Rev.; CONF-870873-8-Rev.; ON: DE87014078
• 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
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CRITICAL TEMPERATURE
DATA
EXPERIMENTAL DATA
INFORMATION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SPECIFIC HEAT
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES