Magnetic properties of superconducting multifilamentary tapes in perpendicular field. II: Horizontal and matrix arrays

TL;DR

This paper models the magnetic behavior, magnetization, and ac losses of superconducting tape arrays in perpendicular magnetic fields, considering geometry, finite thickness, and demagnetizing effects, to better understand experimental observations.

Contribution

It provides a systematic analysis of magnetization and ac losses in superconducting tape arrays, incorporating finite thickness and demagnetizing fields, which advances understanding of their magnetic properties.

Findings

Magnetization and ac losses depend on array geometry and separation.

Finite thickness and demagnetizing fields significantly influence magnetic behavior.

Results explain previously unexplained experimental features.

Abstract

Current and field profiles, and magnetization and ac losses are calculated for arrays of infinitely long superconducting tapes in the critical state in a perpendicularly applied magnetic field. The tapes are arranged both horizontally and in a matrix configuration, which is the geometry found in many actual high-T_c superconducting tapes. The finite thickness of the tapes and the effects of demagnetizing fields are considered. Systematic results for the magnetization and ac losses of the tapes are obtained as function of the geometry and separation of the constituent tapes. Results allow to understand some unexplained features observed in experiments, as well as to propose some future directions.