[20p-B202-1~16] 11.1 Fundamental properties

5:45 PM - 6:00 PM JST(8:45 AM - 9:00 AM UTC)

[20p-B202-16] H content dependence of critical current density in NdFeAs(O,H) and the fabrication of its artificial grain boundaries

〇Takafumi Hatano¹, Hiroya Imanaka¹, Hiroto Hibino¹, Kazumasa Iida^2,3, Hiroshi Ikuta¹ (1.Nagoya Univ., 2.Nihon Univ., 3.JST-CREST)

Keywords:

iron based superconductors,thin films,grain boundary junction

NdFeAsO exhibits a high superconducting transition temperature above 50 K by substituting F/H at the O site. Recently, we have prepared high-quality single-crystal thin films of NdFeAs(O,H). Our recent experiments revealed that the H-substituted sample, which corresponds to a carrier doping beyond the solubility limit of the F-substituted sample, shows a critical current density Jc higher than them of the F-substituted samples. In this talk, the H content dependence of Jc will be shown, and the fabrication of artificial grain boundaries in H-substituted thin films will be reported.