Temperature dependence of the trapped magnetic field in MgB2 bulk superconductors

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: high-pressure sintering and hot pressing. Experimentally measured trapped field values for the first sample coincide remarkably well with calculated ones over the whole temperature range. This shows, on one hand, the validity of the introduced calculation approach, and demonstrates, on the other hand, the great prospects of the hot pressing technology for large scale superconducting applications of the MgB₂.