Shape Distortion by Irreversible Flux-Pinning-Induced Magnetostriction

Details Shape Distortion by Irreversible Flux-Pinning-Induced Magnetostriction Shape Distortion by Irreversible Flux-Pinning-Induced Magnetostriction

1997-12-08

arxiv.org/abs/cond-mat/9712091v1

Physics

Condensed Matter

Superconductivity

4 pages, 4 graphs

Scientific paper

10.1103/PhysRevLett.80.4757

Exact analytical results are obtained for the flux-pinning-induced magnetostriction in cylindrical type-II superconductors placed in parallel magnetic field. New modes of irreversible deformation are found: In contrast to the circular cylinder where shape is conserved, it is shown that a square cross-section deforms with considerable distortion. During a field cycle both concave, convex, and even more complicated distortions are predicted. Strong implications for dilatometric measurements on crystals are emphasized. The main results are valid for any critical-state model, j_c = j_c(B).

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