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Compressibility, specific heat capacity, and Grüneisen parameter for C60/C70
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Applied Physics and Electronics.
Umeå University, Faculty of Science and Technology, Applied Physics and Electronics.
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1992 (English)In: Solid State Communications, ISSN 0038-1098, E-ISSN 1879-2766, Vol. 84, no 9, 879-883 p.Article in journal (Refereed) Published
Abstract [en]

We have measured the specific heat capacity cp of C60/C70 between 110 and 310 K and its compressibility κ up to 1.1 GPa (11 kbar) at 293 K, a range in t and p which overlaps reported ranges of stability of both the rotationally disordered high T, low p fcc phase and the low T high p orientationally ordered sc phase. No sharp anomaly is observed in cp at the transition. The bulk modulus B near p = 0 was 8.4 GPa, rapidly increasing to about 16 GPa near 1 GPa. For our data, the intermolecular forces could be modeled by either a Lennard-Jones or a Born-Mayer potential, but this was not the case if literature data for compression vs. p were used.

Place, publisher, year, edition, pages
Elsevier Science Ltd , 1992. Vol. 84, no 9, 879-883 p.
Keyword [en]
Fullerenes, C60, compressibility, bulk modulus, specific heat capacity, Grüneisen parameter, high pressure, intermolecular potential, Lennard-Jones potential, Born-Mayer potential, phase transition
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-26556DOI: 10.1016/0038-1098(92)90451-EOAI: oai:DiVA.org:umu-26556DiVA: diva2:272355
Available from: 2009-10-15 Created: 2009-10-15 Last updated: 2017-12-12

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Lundin, AndersSundqvist, BertilFransson, ÅkePettersson, Sune
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