The low-temperature heat capacity of fullerite C₆₀
The heat capacity at constant pressure of fullerite C₆₀ 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 intramolec...
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| Published in: | Физика низких температур |
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| Date: | 2015 |
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| Format: | Article |
| Language: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2015
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/127965 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | The low-temperature heat capacity of fullerite C₆₀ / М.I. Bagatskii, V.V. Sumarokov, M.S. Barabashko, A.V. Dolbin, B. Sundqvist// Физика низких температур. — 2015. — Т. 41, № 8. — С. 812–819. — Бібліогр.: 54 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862652147671236608 |
|---|---|
| author | Bagatskii, M.I. Sumarokov, V.V. Barabashko, M.S. Dolbin, A.V. Sundqvist, B. |
| author_facet | Bagatskii, M.I. Sumarokov, V.V. Barabashko, M.S. Dolbin, A.V. Sundqvist, B. |
| citation_txt | The low-temperature heat capacity of fullerite C₆₀ / М.I. Bagatskii, V.V. Sumarokov, M.S. Barabashko, A.V. Dolbin, B. Sundqvist// Физика низких температур. — 2015. — Т. 41, № 8. — С. 812–819. — Бібліогр.: 54 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | The heat capacity at constant pressure of fullerite C₆₀ 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 C₆₀
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 C60 is described by the linear and cubic
terms. The limiting Debye temperature at T → 0 K has been estimated (Θ0 = 84.4 K). In the interval from 1.2 to
30 K the experimental curve of the heat capacity of C₆₀ describes the contributions of rotational tunnel levels,
translational vibrations (in the Debye model with Θ0 = 84.4 K), and librations (in the Einstein model with
ΘE,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 high-temperature limit of translational vibrations (3 R) and
the near-free rotational motion of C60 molecules (1.5 R).
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| first_indexed | 2025-12-01T20:36:18Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-127965 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-12-01T20:36:18Z |
| publishDate | 2015 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Bagatskii, M.I. Sumarokov, V.V. Barabashko, M.S. Dolbin, A.V. Sundqvist, B. 2017-12-31T17:08:58Z 2017-12-31T17:08:58Z 2015 The low-temperature heat capacity of fullerite C₆₀ / М.I. Bagatskii, V.V. Sumarokov, M.S. Barabashko, A.V. Dolbin, B. Sundqvist// Физика низких температур. — 2015. — Т. 41, № 8. — С. 812–819. — Бібліогр.: 54 назв. — англ. 0132-6414 PACS: 65.40.Ba, 65.80.–g, 81.05.ub https://nasplib.isofts.kiev.ua/handle/123456789/127965 The heat capacity at constant pressure of fullerite C₆₀ 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 C₆₀
 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 C60 is described by the linear and cubic
 terms. The limiting Debye temperature at T → 0 K has been estimated (Θ0 = 84.4 K). In the interval from 1.2 to
 30 K the experimental curve of the heat capacity of C₆₀ describes the contributions of rotational tunnel levels,
 translational vibrations (in the Debye model with Θ0 = 84.4 K), and librations (in the Einstein model with
 ΘE,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 high-temperature limit of translational vibrations (3 R) and
 the near-free rotational motion of C60 molecules (1.5 R). The authors are indebted to A.I. Prokhvatilov, A.I. Krivchikov
 and S.B. Feodosyev for a fruitful discussion. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Наноструктуры при низких температурах The low-temperature heat capacity of fullerite C₆₀ Article published earlier |
| spellingShingle | The low-temperature heat capacity of fullerite C₆₀ Bagatskii, M.I. Sumarokov, V.V. Barabashko, M.S. Dolbin, A.V. Sundqvist, B. Наноструктуры при низких температурах |
| title | The low-temperature heat capacity of fullerite C₆₀ |
| title_full | The low-temperature heat capacity of fullerite C₆₀ |
| title_fullStr | The low-temperature heat capacity of fullerite C₆₀ |
| title_full_unstemmed | The low-temperature heat capacity of fullerite C₆₀ |
| title_short | The low-temperature heat capacity of fullerite C₆₀ |
| title_sort | low-temperature heat capacity of fullerite c₆₀ |
| topic | Наноструктуры при низких температурах |
| topic_facet | Наноструктуры при низких температурах |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/127965 |
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