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Expression for the time dependence of current density with avalanche dynamics in type-II superconductors

Journal Article · · Physical Review, B: Condensed Matter; (United States)
;  [1]
  1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
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Based on the concept of self-organized criticality, we have developed an expression for the current decay of type-II superconductors: [ital j]=[ital j][sub [ital c]][minus][ital j][sub [ital c]][[ital kT]/[ital U][sub 0]ln(1+[beta][ital t]/[tau])][sup 1/[beta]]. This expression can be a general description of current decay in a wide range of [ital j]. Magnetic-relaxation experimental results in both high-[ital T][sub [ital c]] superconductors (single crystals of YBa[sub 2]Cu[sub 3]O[sub [ital x]] and Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub [ital x]]) and conventional type-II superconductors (multifilamentary wire of Nb[sub 3]Sn) have shown excellent agreement with our theoretical predication. Several microscopic parameters such as the characteristic energy and the characteristic time for these type-II superconductors have been extracted from the experimental data.

DOE Contract Number:
W-31109-ENG-38
OSTI ID:
5538796
Journal Information:
Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:21; ISSN PRBMDO; ISSN 0163-1829
Country of Publication:
United States
Language:
English

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Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
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
CRITICALITY
CUPRATES
CURRENT DENSITY
HIGH-TC SUPERCONDUCTORS
OXIDES
OXYGEN COMPOUNDS
RELAXATION
RELAXATION TIME
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING WIRES
SUPERCONDUCTORS
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TYPE-II SUPERCONDUCTORS
WIRES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES