Vortex pinning by twin boundaries in copper oxide superconductors

Journal Article · Sun Mar 31 23:00:00 EST 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.7826· OSTI ID:5690104

Blatter, G ^[1]; Rhyner, J ^[2]; Vinokur, V M ^[3]

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1. Institut fuer Theoretische Physik, Eidgenoessische Technische Hochschule Zuerichen Hoenggerberg, CH-8093 Zuerich, (Switzerland) Asea Brown Boveri, Corporate Research, CH-5405 Baden, (Switzerland)
2. Asea Brown Boveri, Corporate Research, CH-5405 Baden, (Switzerland)
3. Institut fuer Theoretische Physik, Eidgenoessische Technische Hochschule Zuerichen Hoenggerberg, CH-8093 Zuerich, (Switzerland)

We investigate the pinning properties of twin boundaries in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals within a collective-pinning theory. For small angles {var theta} between the magnetic field and the twin boundaries, the vortex lattice adjusts to the array of twinning planes. Above the bulk depinning temperature {ital T}{sub {ital p}}, the pinning properties of the twin boundaries are enhanced as compared with the bulk pinning. The combined effects lead to an increased pinning of the vortex lattice at small angles {var theta}, explaining the narrow angular response observed recently in the resistive transition and in torque measurements.

• OSTI ID: 5690104
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:10; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MATHEMATICAL MODELS
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TWINNING
YTTRIUM COMPOUNDS
YTTRIUM OXIDES