Temperature dependence of trapped magnetic field in MgB2 bulk superconductor

TL;DR

This study investigates how the trapped magnetic field in MgB2 bulk superconductors varies with temperature, validating a calculation method and highlighting hot pressing as a promising fabrication technique.

Contribution

It introduces and validates a calculation approach for temperature-dependent trapped fields and compares two fabrication methods, emphasizing hot pressing's potential for large-scale use.

Findings

Calculated trapped fields match experimental data for high-pressure sintering.

Hot pressing shows great potential for large-scale superconducting applications.

The study confirms the validity of the proposed calculation method.

Abstract

Based on DC magnetization measurements, the temperature dependencies of the trapped magnetic field have been calculated for two MgB2 samples prepared by two different techniques: the high-pressure sintering and the hot pressing. Experimentally measured trapped field values for the first sample coincide remarkably well with calculated ones in the whole temperature range. This proves, from one side, the validity of the introduced calculation approach, and demonstrates, from another side, the great prospects of the hot pressing technology for large scale superconducting applications of the MgB2.