[12a-N402-1~11] 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

[12a-N402-11] Annealing effects on superconducting properties of MgB₂ thin films grown on Fe tapes

〇(M1)Akira Yamasaki¹, Hiroto Kambe¹, Iwao Kawayama¹, Takumu Iwanaka², Toshiaki Kusunoki², Ataru Ichinose³, Toshiya Doi¹ (1.Kyoto Univ., 2.Hitachi Ltd., 3.CRIEPI)

Keywords:superconductor, MgB2-thin-film, post-annealing

MgB₂ thin films were prepared on Fe substrates using an EB deposition method, and post-annealed at 650°C for 1, 3 and 5 hours. The superconducting properties improved by 1-hour post-annealing, but deteriorated by 3- to 5-hours post-annealing. These results suggest that Fe diffused from the Fe substrate to the MgB₂ thin film during the post-annealing at 650°C.