Magnetization Loss of MgB2 Superconducting Wire at Various Temperatures

The magnetization loss of MgB 2 wire was investigated using numerical calculations based on the finite element method. Various superconducting properties of MgB 2 wire such as nonlinearity and the field dependence of the critical current were considered in the numerical formulation. An analysis of magnetization loss was carried out as a function of the external magnetic field for a wide range of operating temperatures. The numerical results were compared with conventional theories and were found to be in relatively good agreement. An alternate approach based on a normalization method using critical current data was also employed as a simple method for predicting magnetization loss. The effectiveness of the simple equation for predicting loss was verified by comparisons of both values for various temperatures.