Physics – Condensed Matter – Superconductivity
Scientific paper
2009-10-05
Physica C (2009)
Physics
Condensed Matter
Superconductivity
11 pages, 6 figures, to appear in Physica C, in special issue on Magnetic Flux Line Pinning
Scientific paper
10.1016/j.physc.2009.08.008
Theoretical work predicts that the strong dependence of Tc on pure shear strain within the a-b plane of optimally doped YBa2Cu3O{7-delta} results in heterogenous columnar pins of vortex lines about dislocation lines and about nano-columns inclusions aligned in parallel to the c axis. The critical current of a rigid vortex lattice driven by the Lorentz force in the presence of such clusters of pin/antipin lines is computed using two-dimensional (2D) collective pinning theory and by numerical simulation of the corresponding 2D vortex dynamics. Both theory and computer calculation find that the antipin component of the heterogenous columnar pins contributes substantially to the net in-field critical current.
Oswald John E.
Rodriguez Jose P.
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