The 70th JSAP Spring Meeting 2023

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

[16p-D221-1~11] 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

Thu. Mar 16, 2023 2:00 PM - 5:15 PM D221 (Building No. 11)

Toshinori Ozaki(Kwansei Gakuin Univ.), Yusuke Ichino(Aichi Inst. Tech.), Takanori Motoki(Aoyama Gakuin Univ.)

2:15 PM - 2:30 PM

[16p-D221-2] Annealing effects on superconducting properties of as-grown MgB2 thin films

Akira Yamasaki1, Tatsuya Tashiro1, Iwao Kawayama1, 〇Toshiya Doi1 (1.Kyoto Univ.)

Keywords:superconductor, MgB2 thin film, post anneal

MgB2 thin films were prepared on Si substrates using an EB evaporation method, and post-annealed at 600, 650, 700, and 750°C for 1 second. As the Tc of the as-grown thin film was 34.4 K, those of the samples post-annealed at 600, 650, 700 and 750 °C for 1 s were 35.5, 35.9, 35.7 and 35.9 K, respectively. Post-annealing for only 1 second improved the Tc by 1.1-1.5 K. Even very short time post-annealing like 1 second was found to be effective for improving superconducting properties of as-grown MgB2 thin films.