Origin of the irreversibility line in thin YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} films with and without columnar defects

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.15530· OSTI ID:397633

Prozorov, R ^[1]; Konczykowski, M; Schmidt, B ^[2]; Yeshurun, Y; Shaulov, A ^[1]; Villard, C; Koren, G ^[3]

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1. Institute of Superconductivity, Department of Physics, Bar-Ilan University, 52900 Ramat-Gan (Israel)
2. Laboratoire des Solides Irradies, Ecole Polytechnique, 91128 Palaiseau (France)
3. Department of Physics, Technion, Haifa (Israel)

We report on measurements of the angular dependence of the irreversibility temperature {ital T}{sub irr}({theta}) in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} thin films, defined by the onset of a third-harmonic signal and measured by a miniature Hall probe. From the functional form of {ital T}{sub irr}({theta}) we conclude that the origin of the irreversibility line in unirradiated films is a dynamic crossover from an unpinned to a pinned vortex liquid. In irradiated films the irreversibility temperature is determined by the trapping angle. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 397633
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 54; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
CRYSTAL DEFECTS
GEV RANGE 01-10
HIGH-TC SUPERCONDUCTORS
IRREVERSIBLE PROCESSES
LEAD IONS
MAGNETIC PROPERTIES
MIXED STATE
PHASE DIAGRAMS
RADIATION EFFECTS
SUPERCONDUCTING FILMS
THIN FILMS
TRANSITION TEMPERATURE
YTTRIUM OXIDES