Monotonic decrease of Tcs with thinning of the superconducting MgB2 layer in MgB2/Ni and MgB2/B alternately-layered thin films
We prepared MgB2/Ni and MgB2/B alternately-layered films using electron beam evaporation and coaxial vacuum arc evaporation techniques without any post-annealing. The thickness of each MgB2 layer was designed to be 42, 24 or 15 nm for both MgB2/Ni and MgB2/B alternately-layered films. We confirmed t...
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| Veröffentlicht in: | Superconductor science & technology 2007-12, Vol.20 (12), p.1223-1227 |
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| container_title | Superconductor science & technology |
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| creator | Doi, T Kitaguchi, H Hata, S Fukuyama, K Masuda, K Takahashi, K Yoshidome, T Hakuraku, Y Kuwano, N |
| description | We prepared MgB2/Ni and MgB2/B alternately-layered films using electron beam evaporation and coaxial vacuum arc evaporation techniques without any post-annealing. The thickness of each MgB2 layer was designed to be 42, 24 or 15 nm for both MgB2/Ni and MgB2/B alternately-layered films. We confirmed that the layered structure was successfully obtained from the scanning transmission electron microscopic cross-sectional image of the MgB2/Ni alternately-layered film. The critical temperature, Tc, of the alternately-layered film decreased as the MgB2 layer became thinner, for both MgB2/Ni and MgB2/B films. Moreover, the Tc was affected by only the MgB2 layer thickness, and was independent of the inserted layer materials. |
| doi_str_mv | 10.1088/0953-2048/20/12/023 |
| format | Article |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| title | Monotonic decrease of Tcs with thinning of the superconducting MgB2 layer in MgB2/Ni and MgB2/B alternately-layered thin films |
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