A hybrid-type bulk magnet combining Sm-Ba-Cu-O and Y-Ba-Cu-O superconductors

Abstract We have studied a bulk magnet combining Sm–Ba–Cu–O and Y–Ba–Cu–O superconductors for generating a higher magnetic field. The hybrid-type bulk magnet consists of disk-shaped Sm–Ba–Cu–O and ring-shaped Y–Ba–Cu–O bulk superconductors, thus has the advantageous properties of both of these superconductors. The peak value of the trapped field for the hybrid-type bulk magnet was larger than the simple sum of the Y-type trapped field and the Sm-type trapped field. This effect can be explained by considering the peak effect of J c ( B ) for the Sm–Ba–Cu–O superconductor.