Numerical simulation of magnetization harmonics of disc-shaped hard type-II superconductor with approximation of magnetic field screening in the sample center

Article include mathematical model of the response of disk-shaped hard superconductor to an applied external harmonically modulated magnetic field. In solution which gives Kim model and in approximation of magnetic field screening in the sample center were calculated hysteretic magnetization curves, the first and higher harmonics of magnetization. Calculation results are compared with data of previously performed experiments on polycrystals of high-temperature superconductor.