On the isotope effect in YBa/sub 2/Cu/sub 3/O/sub 7/: Measurements for two methods of synthesis

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:6335836

Clarke, A P; Yvon, P J; Schwarz, R B; Thompson, J D; Meisenheimer, R; Bernardez, L

We prepared superconducting samples of YBa/sub 2/Cu/sub 3/(/sup 18/O)/sub 7-x/ and YBa/sub 2/Cu/sub 3/(/sup 16/O)/sub 7-x/ by two techniques: (a) burning powder of YBa/sub 2/Cu/sub 3/ in /sup 18/O/sub 2/ and /sup 16/O/sub 2/ and (b) crystallizing amorphous powder of YBa/sub 2/Cu/sub 3/(/sup 16/O)/sub 7.8/ in flowing /sup 18/O/sub 2/ and /sub 16/O/sub 2/. The percent of /sup 18/O in the YBa/sub 2/Cu/sub 3/(/sup 18/O)/sub 7-x/ samples was 96.5 at.% for method (a) and 92 at.% for method (b). The YBa/sub 2/Cu/sub 3/(/sup 16/O)/sub 7-x/ samples had 99.8 at.% /sup 16/O. Susceptibility measurements of the superconducting transition temperature show an oxygen isotope effect of 0.4 K for both methods.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6335836
• Report Number(s): LA-UR-89-796; CONF-890215-3; ON: DE89009402
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DATA
EXPERIMENTAL DATA
FABRICATION
INFORMATION
ISOTOPE EFFECTS
ISOTOPES
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PHYSICAL PROPERTIES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE MEASUREMENT
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS