Thin flms of rare-earth-free high T~ superconductors such as Bi-Sr-Ca-Cu-O and TI-Ba-Ca-Cu-O systems have been prepared by RF-magnetron sputtering and subsequent annealing. These thin films showed a polycrystalline structure and had highly orientated c-axes perpendicular to the substrates. These thi
High-Tc superconducting thin films
โ Scribed by Dr. Shintaro Miyazawa; Dr. Yasuo Tazoh; Hidefumi Asano; Dr. Yasuhiro Nagai; Dr. Osamu Michikami; Dr. Minoru Suzuki
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 871 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0935-9648
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โฆ Synopsis
This review describes recent advances in thin film studies of high-T, superconducting cuprates. Emphasis is placed on epitaxial thin film growth technologies for LnBa,Cu,O, (Ln = Y, Eu) cuprates, and on microwave device applications. An exciting area of this research involves epitaxial multilayer structures, such as a superconductor/insulator/superconductor (SIS) combination, and so preliminary results on SIS fabrication are also described.
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The field dependences of the critical current, current-voltage characteristics and a.c. susceptibility have been investigated for superconducting YBa2Cu307 films prepared by laser ablation. It was shown that the flux line pinning in polycrystalline high Tc films occurs due to anisotropy of the super
A proximity system containing a high T~ superconductor can be used to strengthen the field effect. The use of the proximity contact Sh-Nb in the Josephson junction Sh-Nb-lnAs Nb Sh (Sh is a high T c film) is promising from the point of view of making a three-terminal device. The proximity effect can
The fabrication of multilayer Josephson structures based on high-T C thin films is reported. YBa2Cu3Ox thin films are prepared by in-situ rf magnetron sputtering. SIS and SNS edge junctions were produced. In the first case an intermediate layer withstands the high temperature process of the upper HT
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