Geometrical edge barriers and magnetization in superconducting strips with slits

Details Geometrical edge barriers and magnetization in superconducting strips with slits Geometrical edge barriers and magnetization in superconducting strips with slits

2003-02-10

arxiv.org/abs/cond-mat/0302172v1

Physics

Condensed Matter

Superconductivity

11 pages, 5 figures, revtex4

Scientific paper

10.1103/PhysRevB.68.024505

We theoretically investigate the magnetic-field and current distributions for coplanar superconducting strips with slits in an applied magnetic field H_a. We consider ideal strips with no bulk pinning and calculate the hysteretic behavior of the magnetic moment m_y as a function of H_a due solely to geometrical edge barriers. We find that the m_y-H_a curves are strongly affected by the slits. In an ascending field, the m_y-H_a curves exhibit kink or peak structures, because the slits prevent penetration of magnetic flux. In a descending field, m_y becomes positive, because magnetic flux is trapped in the slits, in contrast to the behavior of a single strip without slits, for which m_y =0.

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