Magnetic relaxation and intrinsic pinning in a single crystal of Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub [ital x]]

Journal Article · Mon Mar 01 00:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.5414· OSTI ID:6951812

Sengupta, S; Shi, Donglu; Wang, Zuning; Smith, M E ^[1]; Salem-Sugui, S Jr ^[2]; McGinn, P J ^[3]

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1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Instituto de Fisica, Caixa Postale 6165, Universidade Estadual de Campinas 13081-Campinas, Sao Paulo (Brazil)
3. Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556 (United States)

Magnetic-relaxation experiments were performed on Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub [ital x]] single crystals with the direction of the field parallel to the [ital ab] plane. Based on the relaxation data, we have obtained relationships between the activation energy [ital U] and the current density [ital j] by an approach we developed previously. We found that the activation energy has a logarithmic dependence on [ital j] in a wide regime of driving force. It has been reported that CuO[sub 2] planes in high-[ital T][sub [ital c]] superconductors can act as strong intrinsic pinning centers and that the relation [ital U][similar to][ital U][sub 0]ln([ital j][sub [ital c]]/[ital j]) may describe such a pinning mechanism. Our experimental results have shown good agreement with such a physical model of intrinsic flux pinning.

• DOE Contract Number: W-31-109-ENG-38; FG02-90ER45427
• OSTI ID: 6951812
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 47:9; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CURRENT DENSITY
MAGNETIZATION
MONOCRYSTALS
RELAXATION
STRONTIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTALS
OXIDES
OXYGEN COMPOUNDS
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360607* - Other Materials- Superconducting Properties- (1992-)