Influence of dissolved oxygen on the thermal expansion and polyamorphism of fullerite C60
2007 (English)In: Low temperature physics (Woodbury, N.Y., Print), ISSN 1063-777X, Vol. 33, no 5, 465-471 p.Article in journal (Refereed) Published
The temperature dependence of the coefficient of linear thermal expansion alpha of O-2-C-60 solutions with 20% and 80% filling of the octahedral cavities with oxygen is investigated in the temperature interval 2.2-24 K. Hysteresis of alpha(T) is observed, attesting to the coexistence of two orientational glasses in these solutions. A comparison of the behavior of these glasses is made. The characteristic times for reorientation of the C-60 molecules and for the phase transformations in the solutions are determined. When the temperature of the O-2-C-60 solution with 20 mol.% oxygen is increased to 450 degrees C, a chemical interaction of the oxygen with the C-60 molecules is manifested. It proves possible to separate the influences of the chemical and physical sorption of oxygen on the thermal expansion of polycrystalline fullerite C-60.
Place, publisher, year, edition, pages
2007. Vol. 33, no 5, 465-471 p.
Fullerenes, C60, thermal expansion, polyamorphism, orientational glass, oxygen, intercalation
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:umu:diva-16920DOI: doi:10.1063/1.2737561OAI: oai:DiVA.org:umu-16920DiVA: diva2:156593
Publiceras samtidigt på ryska i Fizika Nizkikh Temperatur vol. 33, no. 5, sidor 618-626 (2007; utgiven av Institute for Low Temperature Physics and Engineering, Kharkov)2007-10-192007-10-192009-03-13Bibliographically approved