Low temperature heat capacity of fullerite C60 doped with nitrogen

Details Low temperature heat capacity of fullerite C60 doped with nitrogen Low temperature heat capacity of fullerite C60 doped with nitrogen

2006-09-04

arxiv.org/abs/cond-mat/0609056v1

Fizika Nizkih Temperatur, 2006, V.32, No.10, p.1275-1277

Physics

Condensed Matter

Materials Science

4 pages, 2 figures, to be published in Fiz. Nizk. Temp. (Low Temp. Phys.)

Scientific paper

10.1063/1.2364490

The heat capacity Cm of polycrystalline fullerite C60 doped with nitrogen has been measured in the temperature interval 2 - 13 K. The contributions to 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.

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