Low temperature flux creep in high- Tc superconductors

Conference · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5531718

Vinokur, V M; Xu, Ming; Crabtree, G W ^[1]; Feigel'man, M V; Geshkenbein, V B ^[2]; Umezawa, A ^[3]

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1. Argonne National Lab., IL (USA)
2. AN SSSR, Moscow (USSR). Inst. Teoreticheskoj Fiziki
3. Argonne National Lab., IL (USA) Alberta Univ., Edmonton, AB (Canada). Dept. of Physics

An exact solution describing flux creep in high-T{sub c} superconductors at low temperatures was found, assuming the creep activation barrier U grows logarithmically with decreasing current j: U = U{sub 0} ln(j{sub 0}/j). The magnetic relaxation of single crystal Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} was measured at moderate temperatures and magnetic fields. Two different regimes corresponding to the partial and full penetration of the magnetic field into the sample were found. The observed magnetic relaxation behavior is in a good agreement with the model proposed. 19 refs., 4 figs.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5531718
• Report Number(s): ANL/CP-73508; CONF-9105151-9; ON: DE91015193
• Resource Relation: Conference: Physical phenomena at high magnetic fields, Tallahassee, FL (USA), 15-18 May 1991
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH OXIDES
MAGNETIC FLUX
CALCIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
STRONTIUM OXIDES
MAGNETIC FIELDS
TYPE-II SUPERCONDUCTORS
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity