Anisotropic superconducting strip in an oblique magnetic field

Abstract

The critical state of a thin superconducting strip in an oblique applied magnetic field H_a is analyzed without any restrictions on the dependence of the critical current density j_c on the local magnetic induction {\bf B}. In such a strip, j_c is not constant across the thickness of the sample and differs from J_c/d, where J_c is the critical sheet current. It is shown that in contrast to the case of {\bf B}-independent j_c, the profiles H_z(x) of the magnetic-field component perpendicular to the strip plane generally depend on the in-plane component H_{ax} of the applied magnetic field H_a, and on how H_a is switched on. On the basis of this analysis, we explain how and under what conditions one can extract j_c({\bf B}) from the magnetic-field profiles H_z(x) measured by magneto-optical imaging or by Hall-sensor arrays at the upper surface of the strip.

7 pages with 4 figures

References in corpus (4)

• Theory of Type-II Superconductors with Finite London Penetration Depth
• Evidences of vortex curvature and anisotropic pinning in superconducting films by quantitative magneto-optics
• Superconducting strip in an oblique magnetic field
• Critical state in type-II superconductors of arbitrary shape

Cited by in corpus (6)

• Computation of Losses in HTS Under the Action of Varying Magnetic Fields and Currents
• AC loss in ReBCO pancake coils and stacks of them: modelling and measurement
• Angular dependenceof the magnetisation AC loss: coated conductors, Roebel cables and double pancake coils
• "Unusual" critical states in type-II superconductors
• Asymmetry of magnetic-field profiles in superconducting strips
• Anisotropic critical-state model of type-II superconducting slabs