Abrikosov flux lattice in planar crystals of YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]]

Journal Article · Tue Nov 01 00:00:00 EST 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.13748· OSTI ID:6836412

Barford, W; Harrison, M ^[1]

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1. Department of Physics, The University of Sheffield, Sheffield, S3 7RH (United Kingdom)

Anisotropic London theory is used to predict the Abrikosov flux lattice for arbitrary field orientations in crystals of YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] by minimizing the Gibbs free energy for samples of a planar geometry. At low fields the vortex-chain state exists, i.e., the interchain vortex separation scales as the inverse flux density 1/[ital B] whereas the intrachain vortex seperation is constant. At higher fields there is a crossover to the uniaxially distorted hexagonal lattice where the intervortex separation scales as 1/[ital B][sup 1/2]. At low fields the vortex lattice is inclined towards the [cflx c] axis, rotating towards the applied field at higher fields. The results of this calculation are in close agreement to the Bitter pattern experiments of Gammel [ital et] [ital al]. [Phys. Rev. Lett. 68, 3343 (1992)] assuming an anisotropy ratio [gamma] of 5 and an in-plane penetration depth [lambda][sub [ital a]] of 1 413 A, indicating that the vortex-chain state has been observed in these experiments.

• OSTI ID: 6836412
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 50:18; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
BARIUM OXIDES
COPPER OXIDES
CRYSTALS
HEXAGONAL LATTICES
LONDON EQUATION
MAGNETIC FIELDS
YTTRIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
EQUATIONS
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
665411* - Basic Superconductivity Studies- (1992-)