Effects of shock-modification on superconductivity in Tl/sub 2/Ca/sub 2/Ba/sub 2/Cu/sub 3/O/sub y/ and Bi/sub 2/CaSr/sub 2/Cu/sub 2/O/sub x/

Conference · Sat Dec 31 23:00:00 EST 1988

OSTI ID:5737467

Venturini, E L; Graham, R A; Ginley, D S; Morosin, B

Powder compacts of superconducting Tl/sub 2/Ca/sub 2/Ba/sub 2/Cu/sub 3/O/sub y/ (Tl-2223) and Bi/sub 2/CaSr/sub 2/Cu/sub 2/O/sub x/ (Bi- 2122) were subjected to controlled, quantitative high-pressure shock-wave loading in gas-tight copper recovery capsules and preserved for post-shock analysis. Magnetization data show a substantial decrease in both diamagnetic shielding and Meissner effect for both compounds following shock modification over a range of peak pressures from 7.5 to 27 GPa and peak temperatures from 150 to 850/degree/C. There is a 5 K increase in the onset of superconductivity in shock-modified Tl-2223, while Bi-2122 shows no measurable change. Magnetic flux creep measurements at low temperature reveal a three-fold increase in the flux pinning energy for Tl-2223 following shock modification. 19 refs., 2 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5737467
• Report Number(s): SAND-89-1115C; CONF-890812-28; ON: DE89017231
• 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
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DETONATIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
MAGNETIZATION
MEISSNER-OCHSENFELD EFFECT
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POWDERS
SAMPLE PREPARATION
SHOCK WAVES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
THALLIUM COMPOUNDS
THALLIUM OXIDES
TRANSITION ELEMENT COMPOUNDS