酸化物超電導体の臨界電流密度におけるピーク効果 : 第 1 報磁化特性と臨界電流密度

概要

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Magnetization measurements of oxide superconductors are informative for understanding their electromagnetic properties. OCMG (Oxygen Control Melt Process) processed REBa_2Cu_3O_y (RE=Sm, Nd, etc.) superconductors show the peak effect in magnetization curve. Pinning centers formed by the OCMG process give such abnormal magnetic characteristics to these type II superconductors. The significant peak effect is an example of important characteristics which gives possibility of high critical current density to these materials. In order to know how we make a sample which shows more significant peak effect and has higher critical current density, we are studying the OCMG processed SmBa_2Cu_3O_y samples. In this preliminary report, the Bean-model which describes well the magnetization characteristics of the superconducting materials and a example of the peak effect of a SmBa_2Cu_3O_y sample which we processed are reported.
湘南工科大学の論文
1997-03-25