Thermally activated resistive behavior and flux motion in La[sub 2[minus][ital x]]Sr[sub [ital x]]CuO[sub 4] single-crystal thin films
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- NTT Interdisciplinary Research Laboratories, Nippon Telegraph and Telephone Corporation, 162 Tokai, Ibaraki 319-11 (Japan)
Thermally activated behavior of the resistive transition under magnetic fields has been studied in La[sub 2[minus][ital x]]Sr[sub [ital x]]CuO[sub 4] ([ital x]=0.1, 0.15, 0.2, and 0.3) single-crystal thin films. It is found that the resistivity [rho] below [ital T][sub [ital c]] scales as [rho]([ital T])=[rho][sub 0]exp[l brace][minus][ital U][sub 0][1[minus][ital T]/[ital T][sub [ital c]]([ital H])][sup [ital n]]/[ital k][sub [ital B]T][r brace], where [ital n]=3 for [bold H][parallel][bold c] and [ital n]=2.5 for [bold H][perpendicular][bold c]. This behavior is explained phenomenologically as the thermal-depinning of vortices in quasi-two-dimensional superconductors having small-sized dense point pins. Numerical fitting provides values for the effective pinning potential and the mean-field upper critical field, which delineates straight [ital H]-[ital T] phase boundaries.
- OSTI ID:
- 6889915
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 46:21; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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OSTI ID:6883808
Variable-range hopping and positive magnetoresistance in insulating Y[sub 1[minus][ital x]]Pr[sub [ital x]]Ba[sub 2]Cu[sub 3]O[sub 7] crystals
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Fri Dec 31 23:00:00 EST 1993
· Physical Review, B: Condensed Matter; (United States)
·
OSTI ID:5425942
Resistive transition, magnetoresistance, and anisotropy in La sub 2 minus x Sr sub x CuO sub 4 single-crystal thin films (JP)
Journal Article
·
Mon Jul 01 00:00:00 EDT 1991
· Physical Review, B: Condensed Matter; (USA)
·
OSTI ID:5662980
Related Subjects
665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL FIELD
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FILMS
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC FIELDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL FIELD
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FILMS
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC FIELDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE