Carrier Density Dependence of the Critical Temperature in BaHfO3 doped SmBa2Cu3O y Films

29th International Symposium on Superconductivity

Sato, S.^1 ; Tsuchiya, Y.^1 ; Ichino, Y.^1 ; Yoshida, Y.^1

Department of Energy Engineering and Science, Nagoya Unviersity, Furo-cho, Chikusa-ku, Nagoya

464-8601, Japan^1

关键词: Critical temperatures;    Density dependence;    High critical current densities;    Low temperatures;    Oxygen annealing;    SmBa2Cu3Oy;    SmBCO film;    Superconducting properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/871/1/012034/pdf
DOI  :  10.1088/1742-6596/871/1/012034

来源: IOP

【 摘 要 】

BaHfO3(BHO) doped SmBa2Cu3Oy, (SmBCO) films show high critical current density (Jc) under magnetic fields. However, excessive addition of BHO causes degradation of superconducting properties. In this study, SmBCO films with different BHO contents were prepared, and the Tc, carrier density and c-axis length were measured. As a result, it was clarifiedthat as the BHO content increases, the c-axis length of SmBCO extends, and Tcand the carrier density decrease. In order to increase the carrier density, we ptimized the oxygen annealing condition. As a result, the Tcand the carrier density were increased by annealing at low temperature for a long time.