Numerical study of dimension effect on critical field of rectangular superconductor when The Ginzburg-Landau parameter is 3

Numerical studies have been done on the effect of size on critical field of superconductor with Ginzburg-Landau parameter (κ) is equal to 3. The object is a Type-II rectangular superconductor wich was assumed to be in a vacuum and subjected to an external magnetic field as a function of time. The TDGL equation and boundary conditions are used to solve the problem numerically by using ψυ method. The results show the data in the form of 〈|ψ'|²〉 –H'_ext graphic for each size variation. The 〈|ψ'|²〉 –H'_ext graphs are used to find the values of H_c1 and H_c3 against of each size variations. From the results of the study, it can be seen that the larger size of superconductor will make the smaller prices of H_c1 and H_c3, until the value tend to be constant.