Structural influence on atomic hopping and electronic states of Pd-based bulk metallic glasses

Tang, X.-P.; Löffler, Jörg F.; Schwarz, R. B.; Johnson, William L.; Wu, Yue
February 2005
Applied Physics Letters;2/14/2005, Vol. 86 Issue 7, p072104
Academic Journal
Atomic motion and electronic structures of Pd–Ni–Cu–P bulk metallic glasses were investigated using 31P nuclear magnetic resonance. The hopping rate of P atoms was determined by the stimulated echo technique. Significant hopping was observed in all alloys well below the glass transition temperature. Increasing the Cu content to above 25 at. % increases P hopping significantly, consistent with the previous finding that the openness of the structure increases with Cu content. In contrast, P hopping is not influenced by changes of local electronic states at P sites, induced by the substitution of Ni by Cu.


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