A New Superconducting Cuprate Prepared by Low-Temperature Thin-Film Synthesis in a Ba -Cu -O System
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概要
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A new high-T_c superconducting cuprate composed of Ba, Cu and 0 was prepared on SrTiO_3(001) substrate by reactive coevaporation. The superconducting phase is formed only in the limited temperature range between 575 and 625℃ and in a narrow compositional range. Observations of the X-rzty diffraction and transmission electron microscopy suggests that the superconducting phase is the 214-based structure. Superconductivity is obtained only after strong oxidation after film growth. The resistivity measurenment shows T^onset_c 〜 60 to 70 K and T^onset_c<_- 38 K and the magnetic measurement shows T^onset_c 〜 85 to 90 K.
- 社団法人応用物理学会の論文
- 1997-03-15
著者
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SATO Hisashi
NTT Basic Research Laboratories
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NAITO Michio
NTT Basic Research Laboratories
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Yamamoto Hideki
Ntt Basic Research Laboratories
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