Abstract
In this paper, the magnetization and magnetoelastic behaviors of superconducting film in perpendicular external magnetic field with viscous flux flow are studied. The distribution of magnetic flux density, current density, physical strength and normal stress in the film is calculated during the increase of external magnetic field. Among others, the variations in shielding region and mechanical response with viscous magnetic flux flow are analyzed. The results indicate that the magnetization and magnetoelastic behavior in the film with viscous flu flow are different from the quasistatic critical state model, such as the origin Bean model. With the obtained results, since the film is in an external field, we can even predict the maximum probability of cracking. Similarly, it is valuable to derive the theory of magnetostriction of thin films to further popularize the method.
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