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The Elementary Interaction between a Crystal Dislocation and the Flux Line Lattice of a Type II Superconductor
Author(s) -
Schneider E.,
Kronmüller H.
Publication year - 1976
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220740129
Subject(s) - condensed matter physics , superconductivity , dislocation , pinning force , niobium , flux pinning , type ii superconductor , physics , lattice constant , magnetic field , critical field , lattice (music) , magnetic flux , materials science , high temperature superconductivity , quantum mechanics , diffraction , critical current , acoustics , metallurgy
Abstract Analytical expressions for the interaction force between the flux line lattice (FLL) and parallel crystal dislocations are derived within the framework of the micromagnetic theory of superconductivity in the field range 0.6 H c2 < H ext < H c2 . The interaction force was calculated for the Δ V ‐effect which results from the inhomogeneous distribution of the order parameter and of the magnetic induction in the periodic FLL. The force exerted per unit length of the FLL by an edge dislocation depends on the value of the applied external magnetic field H ext , and for niobium is of the order of magnitude 10 −4 dyn/cm, while it turns out to vanish for the case of a parallel screw dislocation. At the upper critical field H c2 the pinning force due to one dislocation vanishes for a rigid FLL, however, for the volume pinning force a constant value is obtained.