High-temperature x-ray study of melting and solidification of the Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} on silver
The melting and solidification of a Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} compound on Ag were studied by in-situ high-temperature x-ray analysis. Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}/Ag samples were heated by the heating schedule known as partial melting and slow cooling under a 1--100%-O{sub 2}/He gas flow. A strong C-axis alignment of the Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} crystals was observed at the incongruent-melting temperature where the Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} and the molten phase coexist. Similarly, a strong c-axis alignment was observed at the initial stage of solidification. However, the subsequent solidification of the residual molten phase caused less aligned Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} on Ag. An improved heating schedule is proposed which increases the critical current of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}/Ag superconducting tapes.
- Research Organization:
- National Research Inst. for Metals, Tsukuba (JP)
- OSTI ID:
- 20012876
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 117; ISSN JLTPAC; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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