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Similarities in the Cp/T3 peaks in amorphous and crystalline metals

Safarik, D J ; Schwarz, R B ; Hundley, M F

Physical review letters, 2006-05, Vol.96 (19), p.195902-195902, Article 195902 [Periódico revisado por pares]

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Título:
Similarities in the Cp/T3 peaks in amorphous and crystalline metals
Autor: Safarik, D J ; Schwarz, R B ; Hundley, M F
É parte de: Physical review letters, 2006-05, Vol.96 (19), p.195902-195902, Article 195902
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: A low-temperature peak in C(p)/T(3) vs is ubiquitous to glasses. It arises from an abundance of low-frequency vibrations, the origin of which remains unclear. A comparable C(p)/T(3) vs peak is observed in crystals due to the dispersion of acoustic phonons and/or the excitation of optical phonons. We compared the C(p)/T(3) vs peaks in metallic and oxide glasses to elemental crystals by analyzing specific heat, phonon density of states, and elastic constant data. We observe no clear distinction in the peak temperature or amplitude between metallic glasses and crystals. Surprisingly, the peak is larger in single crystal Pd(40)Cu(40)P(20) than in glassy Pd(40)Cu(40)P(20).
Editor: United States
Idioma: Inglês

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