초록

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Abstract ▼ AI-Helper

We recently showed from the neutron diffraction and extended X-ray absorption fine structure studies the structural evidence for the formation of an amorphous phase in immiscible Cu-Ta system subjected to mechanical alloying. In a system with a positive heat of mixing like Cu-Ta, we consider it nece...

We recently showed from the neutron diffraction and extended X-ray absorption fine structure studies the structural evidence for the formation of an amorphous phase in immiscible Cu-Ta system subjected to mechanical alloying. In a system with a positive heat of mixing like Cu-Ta, we consider it necessary to confirm the formation of an amorphous phase not only from the structural studies but also from a change in the electronic properties. We show the electronic evidence for the formation of the chemical bonding between the unlike atoms Cu and Ta for the 120 h-milling sample through changes in superconducting transition temperature and X-ray photoemission spectroscopy valence band structure.