Properties of the flux-line lattice in anisotropic superconductors near H sub c 2

Journal Article · Wed Aug 01 00:00:00 EDT 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.42.2023· OSTI ID:6473442

Petzinger, K G; Warren, G A ^[1]

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1. College of William and Mary, Physics Department, Williamsburg, VA (USA)

Using anisotropic Ginzburg-Landau (GL) equations based upon a tensor effective-mass approximation, we study the vortex lattice geometry near the upper critical field {ital H}{sub {ital c}2}. We employ a scaling technique to reduce the first GL equation to isotropic form. This permits simple evaluation of the angular dependence of the upper critical field for arbitrary mass anisotropy. Although the mass tensor cannot be scaled out of the second GL equation, the two equations may be solved and the free energy evaluated. In the high-{kappa} limit appropriate, e.g., to the new high-temperature superconductors, the geometry of the fluxoid lattice is found to be hexagonal in scaled coordinates but with a preferred orientation relative to the underlying crystallographic axes. The internal magnetic fields both parallel and perpendicular to the vortex axis are determined for the special case of uniaxial anisotropy.

• OSTI ID: 6473442
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:4; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
CRITICAL FIELD
CRYSTAL LATTICES
CRYSTAL STRUCTURE
EFFECTIVE MASS
GINZBURG-LANDAU THEORY
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
MASS
SCALING LAWS
SPACE DEPENDENCE
SUPERCONDUCTORS
TENSORS