Longitudinal critical current in type II superconductors. I. Helical vortex instability in the bulk

Journal Article · Wed Jul 01 00:00:00 EDT 1981 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00115074· OSTI ID:6166459

Brandt, E H

The vortex lattice in type II superconductors is unstable against the growth of helical perturbations if the current along the vortices exceeds a critical value. The longitudinal critical current, the pitch, and the spatially varying amplitude of the elliptically polarized helices are calculated from the London theory at the onset of instability in planar current distributions far from the surface. For weak pinning (..cap alpha../sub L/lambda/sup 2/<<<..cap alpha../sub lambda//sup 2/<>c/sub 11/) helical instability occurs at pin-free vortex sections, the helix wavelength is 2.2d, and the critical current density is 0.47Hd/lambda/sup 2/ (H, d, c/sub 11/ and c/sub 66/ and ..cap alpha../sub L/ are the magnetic field, spacing, elastic moduli, and pinning parameter of the vortex lattice, and lambda is the magnetic pentration depth).

• Research Organization: Max-Planck-Institut fuer Metallforschung, Institut fuer Physik, Stuttgart, Germany
• OSTI ID: 6166459
• Journal Information: J. Low Temp. Phys.; (United States), Vol. 44:1
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
TYPE-II SUPERCONDUCTORS
CRITICAL CURRENT
VORTICES
ELASTICITY
MAGNETIC FIELDS
PENETRATION DEPTH
CURRENTS
ELECTRIC CURRENTS
MECHANICAL PROPERTIES
SUPERCONDUCTORS
TENSILE PROPERTIES
656101* - Solid State Physics- Superconductivity- General Theory- (-1987)