[19a-C31-1~6] 11.1 Fundamental properties

9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)

[19a-C31-3] Intrinsic effects of Pr and Zn doping on physical properties of Y247.

〇Haruto Niitsu¹, Tetsuya Matsushita¹, Takanori Motoki¹, Jun-ichi Shimoyama¹ (1.Aoyama Gakuin Univ.)

Keywords:

superconductivity

According to the conventional understanding, the CuO₂ plane is responsible for superconductivity in copper oxide superconductors. However, Pr123 and Pr124 don’t show superconductivity due to hole carriers are trapped by Pr³⁺ ions. On the other hand, Pr247 which has an alternate stacking structure of Pr123 and Pr124 has been confirmed to exhibit superconductivity by controlling the oxygen content through appropriate reductive post-annealing, even though the CuO₂ plane is insulating. In my study, sintered bulks of (Y,Pr)247 were synthesized and characterized its physical properties. In particular, I expect that the superconductivity of the CuO₂ plane disappears with decreasing oxygen content and becomes non-superconducting, a reentrant of superconductivity in the CuO double chain when the oxygen content is controlled to be moderately small. In addition, sintered bulks of Zn-doped Y247 were synthesized and characterized its physical properties.