Determination of critical current density in melt-processed HTS bulks from levitation force measurements

TL;DR

This paper introduces a straightforward method to determine the critical current density in melt-processed high-temperature superconductor (HTS) bulks using levitation force measurements, with results closely matching experimental data.

Contribution

It presents new methods for calculating critical current density from levitation force data, improving accuracy and simplicity over previous approaches.

Findings

Calculated levitation force hysteresis loops match experimental data

Determined average $ab$-plane $J_c$ values for field parallel to this plane

Methods provide reliable $J_c$ estimation from force measurements

Abstract

A simple approach to describe the levitation force measurements on melt-processed HTS bulks was developed. A couple of methods to determine the critical current density $J_c$ were introduced. The averaged $ab$-plane $J_c$ values for the field parallel to this plane were determined. The first and second levitation force hysteresis loops calculated with these $J_c$ values coincide remarkably well with the experimental data.