Lower critical field of a superconductor with uniaxial anisotropy

Journal Article · Tue Jun 01 00:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.14630· OSTI ID:6769485

Klemm, R A ^[1]

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1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Exact transformation of the Ginzburg-Landau free energy with uniaxial anisotropy and a variational procedure are used to calculate accurately the line energy of a single magnetic vortex for arbitrary stiffness [kappa][sub [perpendicular]] and anisotropy [gamma]. The lower critical field [ital H][sub [ital c]1]([theta][sub [ital H]]) can exhibit a discontinuity, a kink, or be monotonic. Comparisons with experiment are made, and materials likely to exhibit such anomalies are suggested. The effective core cross section in the anisotropic London model is found.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6769485
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:21; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
CALCULATION METHODS
CRITICAL FIELD
EQUATIONS
GINZBURG-LANDAU THEORY
LONDON EQUATION
MAGNETIC FIELDS
SUPERCONDUCTORS
TYPE-II SUPERCONDUCTORS
VARIATIONAL METHODS
VORTICES