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arXiv · cond-mat/9712091

Shape Distortion by Irreversible Flux-Pinning-Induced Magnetostriction

T. H. Johansen·J. Lothe·H. Bratsberg
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Abstract

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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T. H. Johansen, J. Lothe, H. Bratsberg. 1997-12-08. Shape Distortion by Irreversible Flux-Pinning-Induced Magnetostriction. https://doi.org/10.1103/physrevlett.80.4757

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