[E2-PR11] Slot 11

[E2-PR11-14] High performance K-doped BaFe₂As₂ superconducting thin films by naturally formed low-angle grain boundary networks

*Kazumasa Iida^1,7, Dongyi Qin², Chiara Tarantini³, Takafumi Hatano^1,7, Chao Wang⁴, Zimeng Guo^5,7, Hongye Gao⁴, Hikaru Saito^6,7, Satoshi Hata^4,5,7, Michio Naito^2,7, Akiyasu Yamamoto^2,7 (1. Nagoya Univ. (Japan), 2. Tokyo Univ. of Agriculture and Tech. (Japan), 3. Applied Superconductivity Center, National High Magnetic Field Lab., Florida State Univ. (United States of America), 4. The Ultramicroscopy Res. Center, Kyushu Univ. (Japan), 5. Interdisciplinary Graduate School of Eng. Sci., Kyushu Univ. (Japan), 6. Inst. for Materials Chemistry and Eng., Kyushu Univ. (Japan), 7. JST CREST (Japan))

Keywords:Fe-based superconductor, potassium doping, critical current density, pinning