Irreversible Magnetization of Pin-Free Type II Superconductors

Details Irreversible Magnetization of Pin-Free Type II Superconductors Irreversible Magnetization of Pin-Free Type II Superconductors

1999-04-14

arxiv.org/abs/cond-mat/9904191v1

Physics

Condensed Matter

Revtex file and 4 figures. Gives exactly 4 pages with figures inside the text

Scientific paper

10.1103/PhysRevB.60.11939

The magnetization curve of a type II superconductor in general is hysteretic even when the vortices exhibit no volume or surface pinning. This geometric irreversibility, caused by an edge barrier for flux penetration, is absent only when the superconductor has precisely ellipsoidal shape or is a wedge with a sharp edge where the flux lines can penetrate. A quantitative theory of this irreversibility is presented for pin-free disks and strips with constant thickness. The resulting magnetization loops are compared with the reversible magnetization curves of ideal ellipsoids.

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