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Report No.

Separation in $$varepsilon$$-phase of BiPb alloy under mega-gravity

Okayasu, Satoru ; Ono, Masao ; Nishio, Taichiro*; Iguchi, Yusuke*; Mashimo, Tsutomu*

Atomic sedimentation in solid occurs under mega-gravity treatment. As the result, partially melt-growth in $$varepsilon$$-phase of BiPb-alloy occurs. Small difference of densities between fully hcp structure of Bi$$_{3}$$Pb$$_{7}$$ and that of partially defected Bi$$_{3}$$Pb$$_{(7-delta)}$$ are enhanced under mega-gravity, and cause the separation of the $$varepsilon$$-phase. Superconducting properties differs between the separated two phases.



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