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Molecular rotation in C70 at high pressures: a thermal conductivity study
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
1996 (English)In: Journal of Physics and Chemistry of Solids, ISSN 0022-3697, E-ISSN 1879-2553, Vol. 57, no 9, 1371-1375 p.Article in journal (Refereed) Published
Abstract [en]

We have measured the thermal conductivity ε and the heat capacity per unit volume varrhocp of highly pure C70 in the temperature interval 100–450 K under pressures up to 1 GPa. Anomalies indicating freezing of uniaxial molecular rotation were observed in λ and varrhocp upon both cooling and increasing pressure. The phase boundary for this transition has an approximate slope dT/dp = 70 K Gpa−1. The temperature and pressure dependence of λ indicate a substantial amount of structural defects in the sample and strong metastability effects.

Place, publisher, year, edition, pages
Elsevier Science Ltd , 1996. Vol. 57, no 9, 1371-1375 p.
Keyword [en]
Fullerenes, C70, high pressure, thermal conductivity, molecular orientation, molecular rotation, uniaxial rotation, phase diagram
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-26015DOI: 10.1016/0022-3697(96)00030-3OAI: oai:DiVA.org:umu-26015DiVA: diva2:235798
Available from: 2009-09-18 Created: 2009-09-18 Last updated: 2017-12-13

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