Low-temperature heat capacity of fullerite C₆₀ doped with deuteromethane
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Low-temperature heat capacity of fullerite C₆₀ doped with deuteromethane
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| Creator |
Bagatskii, M.I.
Sumarokov, V.V. Dolbin, A.V. |
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| Subject |
Наноструктуры при низких температурах
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| Description |
The heat capacity C of fullerite doped with deuteromethane (CD₄)₀.₄(C₆₀) has been investigated in the temperature interval 1.2–120 K. The contribution CD₄ ΔC of the CD₄ molecules to the heat capacity C has been separated. It is shown that at T ≈ 120 K the rotational motion of CD₄ molecules in the octahedral cavities of the C₆₀ lattice is weakly hindered. As the temperature decreases to 80 K, the rotational motion of the CD4 molecules changes from weakly hindered rotation to libration. In the range T = 1.2–30 K CD₄ ΔC is described quite accurately by the sum of contributions from the translational and librational vibrations and tunneling rotation of the CD₄ molecules. The contribution of tunneling rotation to the heat capacity CD₄ ΔC T( ) is dominant below 5 K. The effect of nuclear-spin conversion of the CD₄ molecules upon the heat capacity has been observed and the characteristic times of nuclear spin conversion between the lowest levels of the A- and T-species of the CD₄ molecules at T < 5 K have been estimated. A feature observed in the curve CD₄ ΔC T( ) near T = 5.5 K is most likely a manifestation of a first-order phase transition in the orientational glass of the solution. |
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| Date |
2017-05-16T15:44:39Z
2017-05-16T15:44:39Z 2012 |
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| Type |
Article
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| Identifier |
Low-temperature heat capacity of fullerite C₆₀ doped with deuteromethane / M.I. Bagatskii, V.V. Sumarokov, A.V. Dolbin // Физика низких температур. — 2012. — Т. 38, № 1. — С. 87-94. — Бібліогр.: 59 назв. — англ.
PACS: 65.40.Ba, 65.80.–g66.35.+a, 81.05.ub 0132-6414 http://dspace.nbuv.gov.ua/handle/123456789/116828 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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