Thermodynamics of C60 fullerene is the 0?340 K range

Zhogova, K. B.; Быкова, Т. А.; Kaverin, B. S.; Karnatsevich, V. L.; Lopatin, M. A.

doi:10.1007/bf01430721

Cited by 33 publications

(67 citation statements)

References 16 publications

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“…The experimental results on the specific heat C p (T) of fullerite C 60 and the literature data [16][17][18][19][20][21][22][23][24][25] are illustrated in Fig. 1 for the temperature regions 0.2-300 K (a), 0.2-120 K (b) and 0.2-50 K (c) in the log-log scale representation.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore their C p (T) differs significantly in value and behavior from the results in [16][17][18][19][20][21][22][23][24]. The systematic discrepancy between both the curves C p (T) and the T c -values taken on heating the samples in adiabatic calorimeters [16][17][18][19][20][21] are due to the variations in the purity [16,17,28] and perfection [20] of the samples. The systematic scatter of the data on the thermodynamic properties of C 60 is also caused by the influence of the temperature prehistory of the samples and by thermocycling [29][30][31].…”

Section: Introductionmentioning

confidence: 86%

“…In interval from 4 to 160 K the discrepancy between the data in [16][17][18][19][20][21][22][23] is within 25%. The data in [24] are 50-100% over those in [16][17][18][19][20][21][22][23]. Olson et al [25] investigated a solid ~15% C 70 -C 60 mixture.…”

Section: Introductionmentioning

confidence: 97%

“…Since the discovery of the fullerite molecule C 60 [1], the low-temperature physical properties of fullerite C 60 have been investigated by various methods: inelastic neutron scattering [2,3], infrared and Raman spectroscopy [4,5], x-ray [3,6,7], neutron [8] and electron [9,10] diffraction, NMR [11], dilatometry [12][13][14][15] and calorimetry [16][17][18][19][20][21][22][23][24][25]. It has found that fullerite C 60 is a molecular crystal in which the molecules are bonded by the van der Waals forces and its physical properties are largely determined by the dynamics of the rotational motion of the C 60 molecules.…”

Section: Introductionmentioning

confidence: 99%

“…16, 17 (at a temperature range 11-300 K), [18] (13-300 K), [19] (5-340 K), [20] (6-350 K), [21] (1.2-30 K) and by thermal relaxation method in [22,23] (1.4-20 K), [24] (4-300 K) and [25] (0.2-190 K). In interval from 4 to 160 K the discrepancy between the data in [16][17][18][19][20][21][22][23] is within 25%. The data in [24] are 50-100% over those in [16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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The low-temperature heat capacity of fullerite C60

Bagatskii

Sumarokov

Barabashko

et al. 2015

Low Temperature Physics

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PostprintThis is the accepted version of a paper published in Low temperature physics (Woodbury, N.Y., Print). This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Bagatskii, M., Sumarokov, V., Barabashko, M., Dolbin, A V., Sundqvist, B. (2015) The low-temperature heat capacity of fullerite C 60 . Abstract:The heat capacity at constant pressure of fullerite C 60 has been investigated using an adiabatic calorimeter in a temperature range from 1.2 to 120 K. Our results and literature data have been analyzed in a temperature interval from 0.2 to 300 K. The contributions of the intramolecular and lattice vibrations into the heat capacity of C 60 have been separated. The contribution of the intramolecular vibration becomes significant above 50 K. Below 2.3 K the experimental temperature dependence of the heat capacity of C 60 is described by linear and cubic terms. The limiting Debye temperature at T → 0 K has been estimated (Θ 0 = 84.4 K). In the interval from 1.2 to 30 K the experimental curve of the heat capacity of C 60 describes the contributions of rotational tunnel levels, translational vibrations (in the Debye model with Θ 0 = 84.4 K), and librations (in the Einstein model with Θ E,lib = 32.5 K). It is shown that the experimental temperature dependences of heat capacity and thermal expansion are proportional in the region from 5 to 60 K. The contribution of the cooperative processes of orientational disordering becomes appreciable above 180 K. In the high-temperature phase the lattice heat capacity at constant volume is close to 4.5 R, which corresponds to the hightemperature limit of translational vibrations (3 R) and the near-free rotational motion of C 60 molecules (1.5 R).

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