@article{oai:kyutech.repo.nii.ac.jp:00000253,
 author = {Matsushita, Teruo and 松下, 照男 and 小田部, エドモンド 荘司 and Otabe, Edmund Soji and Wada, H and Takahama, Y and Yamauchi, H},
 issue = {1-2},
 journal = {Physica C: Superconductivity},
 month = {Oct},
 note = {Size dependencies of the peak effect and irreversibility field in superconducting Sm-123 powder specimens were investigated. The peak effect was found to disappear in the two-dimensional pinning regime in which powder size is smaller than pinning correlation length. This shows that the peak effect does not originate directly from elementary pinning mechanisms, but from a cooperative phenomenon of flux lines, as proposed by the pinning-induced disorder transition model. In addition, when powder size is smaller than virtual pinning correlation length in the ideal creep-free case, irreversibility field decreases with powder size. This supports the hypothesis that longitudinal flux bundle size is given by this length, as predicted by flux creep theory. These findings indicate that pinning correlation length is a general parameter that determines various properties associated with flux pinning phenomena.},
 pages = {38--46},
 title = {Size dependencies of the peak effect and irreversibility field in superconducting Sm-123 powders},
 volume = {397},
 year = {2003},
 yomi = {マツシタ, テルオ and オタベ, エドモンド ソウジ}
}