The 65h JSAP Spring Meeting, 2018

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11 Superconductivity » 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

[18p-B403-1~19] 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

Sun. Mar 18, 2018 1:15 PM - 6:30 PM B403 (53-403)

Toshinori Ozaki(Kwansei Gakuin Univ.), Ryo Teranishi(Kyushu Univ.), Yusuke Ichino(Nagoya Univ.)

3:45 PM - 4:00 PM

[18p-B403-10] Grain boundary characteristics of oxypnictide NdFeAs(O,F) superconductors

〇Kazumasa Iida1, Taito Omura1, Takuya Matsumoto1, Takafumi Hatano1, Hiroshi Ikuta1 (1.Nagoya Univ.)

Keywords:oxypnictide NdFeAs(O, F) thin films, grain boundary characteristics, inter-grain Jc

To characterize the intrinsic nature of grain boundary (GB) for NdFeAs(O,F), the erosion of GB region by the excess of F should be prevented as much as possible. Here we report on the GB characteristics of NdFeAs(O,F) thin films for which NdOF over-layer was deposited at lower temperature. As a result, the critical angle for which Jc starts to fall exponentially is 8.4 degree. This value is almost the same as Co-doped BaFe2As2 and Fe(Se,Te).