[8a-N404-1~11] 11.1 Fundamental properties

9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)

[8a-N404-1] A novel H/F doping method for polycrystalline SmFeAsO bulk samples

〇Shunya Tomioka¹, Kenshin Sakurai¹, Fumiya Shimoyama³, Takafumi Hatano¹, Akiyasu Yamamoto³, Hiroshi Ikuta^1,2 (1.Dept. Mater. Phys., Nagoya Univ., 2.RCCME, Nagoya Univ., 3.Dept. Appl. Phys., Tokyo Univ. Agric. & Technol.)

Keywords:

Iron-based superconductor

LnFeAsO (Ln = Nd, Sm) exhibits the highest critical temperature (T_c = 56 K) among iron-based superconductors when the O sites are partially substituted with H or F. However, the high reactivity of the H/F precursor compounds facilitates the formation of impurities such as LnOF and FeAs. On the other hand, in the case of thin films, it is possible to obtain LnFeAs(O,H) thin films through a topotactic reaction by annealing a single-phase LnFeAsO thin film with CaH₂. Therefore, we conducted experiments aiming to synthesize SmFeAs(O,H/F) bulk materials by applying this method to bulk samples.