Low-temperature heat capacity of fullerite C₆₀ doped with nitrogen

• Опубліковано в: : Физика низких температур
• Дата: 2006
• Автори: Gurevich, A.M., Terekhov, A.V., Kondrashev, D.S., Dolbin, A.V., Cassidy, D., Gadd, G.E., Moricca, S., Sundqvist, B.
• Формат: Стаття
• Мова: English
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2006
• Теми: Кpаткие сообщения
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/120785
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Low-temperature heat capacity of fullerite C₆₀ doped with nitrogen / A.M. Gurevich, A.V. Terekhov, D.S. Kondrashev, A.V. Dolbin, D. Cassidy, G.E. Gadd, S. Moricca, B. Sundqvist // Физика низких температур. — 2006. — Т. 32, № 10. — С. 1275–1277. — Бібліогр.: 12 назв. — англ.

The heat capacity Cm of polycrystalline fullerite C₆₀ doped with nitrogen has been measured in the temperature interval 2–13 K. The contributions to the heat capacity from translational lattice vibrations (Debye contribution), orientational vibrations of the C₆₀ molecules (Einstein contribution), and from the motion of the N₂ molecules in the octahedral cavities of the C₆₀ lattice have been estimated. However, we could not find (beyond the experimental error limits) any indications of the first-order phase transformation that had been detected earlier in the dilatometric investigation of the orientational N₂–C₆₀ glass. A possible explanation of this fact is proposed.