Effect of Ferromagnetic Particles on the Effective Magnetostriction of Bulk Superconductor

In this paper, the dependence of the effective magnetostriction of the bulk superconductor and magnetic parameters or elastic parameters such as permeability, volume fraction, and elastic modulus under viscous flux flow is investigated theoretically by developing a simplified model of ferromagnetic particle inclusions-superconductor. Calculations were performed using the planar strain method, and it was found that changes in the magnetic permeability and elastic parameters of ferromagnetic particles lead to changes in stress and strain in the bulk superconductor. The distributions of displacements in the superconductor were obtained from the stress, strain, and boundary condition calculations, and the effects of ferromagnetic particles on the magnetostriction of the bulk superconductor were further sought. The results show that ferromagnetic particles with different permeability and elastic parameters can change the distribution of displacement and magnetostriction in the superconductor.