Influence of dissolved oxygen on the thermal expansion and polyamorphism of fullerite C60

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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)
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.

Vinnikov, N A (author)
Gavrilko, V G (author)
Esel'son, V B (author)
Manzhelii, Vadim Grigorievich (author)
Sundqvist, BertilUmeå universitet,Institutionen för fysik(Swepub:umu)besu0001 (author)
Umeå universitetInstitutionen för fysik (creator_code:org_t)

In:Low temperature physics (Woodbury, N.Y., Print): AIP Publishing33:5, s. 465-4711063-777X1090-6517

By the author/editor: Dolbin, Alexande ...; Vinnikov, N A; Gavrilko, V G; Esel'son, V B; Manzhelii, Vadim ...; Sundqvist, Berti ...

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NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

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