Low-temperature thermal properties of icosahedral Al-Re-Pd

Autor:	M. A. Chernikov, H. R. Ott, U. Gubler, Andrea Bianchi, E. Felder
Rok vydání:	1996
Předmět:	symbols.namesake Thermal conductivity Materials science Condensed matter physics Scattering Icosahedral symmetry Electric field Thermal symbols General Physics and Astronomy Grain boundary Quantum tunnelling Debye model
Zdroj:	ResearcherID
ISSN:	1286-4854 0295-5075
DOI:	10.1209/epl/i1996-00132-1
Popis:	We report measurements of the thermal conductivity λ(T) and the specific heat Cp(T) of icosahedral Al70Re8.6Pd21.4 at low temperatures. Below 1 K, the behaviour of the quasilattice thermal conductivity λph(T) is compatible with the scattering of vibrational excitations involving tunnelling states and grain boundaries. The specific heat Cp(T) contains a small linear contribution γ T. Our λph(T) results indicate that a substantial part of γ T may be attributed to the excitations of tunnelling states. Below 0.4 K Cp(T) increases with decreasing T and at the lowest temperatures it varies as T−2, suggestive of an interaction of the quadrupolar moments of 185Re and 187Re nuclei with the gradient of electric fields induced by their neighbours.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2366a98815059ffc7b216cf41c277ee9 https://doi.org/10.1209/epl/i1996-00132-1 Zobrazit plný text záznamu