Modeling of Critical Current Density of Bulk High Tc Superconductors |
| M. Santosh
St. Mary International School, 1-16-19, Seta, Setagaya-ku, Tokyo 158-8668, Japan |
| Received: February 3, 2014; In final form: May 5, 2014 |
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| Magnetic field dependence of critical current density (Jc) of ErBa2Cu3Oy thick film "Er-123" and melt textured GdBa2Cu3Oy bulk "Gd-123" at liquid nitrogen temperature is reported. Gd-123 exhibits a usual peak effect at magnetic fields around 2 T, while Jc of the Er-123 thick film continuously decreases with increasing field. The model of thermally activated flux motion was adopted to fit the critical current density of both Gd-123 and Er-123 materials. It was found that the critical current density of both types of the high Tc materials could be modeled by the model of thermally activated flux motion utilizing a combination of two functions; one increasing and another one decreasing with field. |
DOI: 10.12693/APhysPolA.126.808 PACS numbers: 74.72.-h; 74.25.Sv; 74.20.-z |