Low temperature microhardness of Xe-intercalated fullerite C60

Автор(и)

  • L.S. Fomenko B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
  • S.V. Lubenets B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
  • V.D. Natsik B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
  • D. Cassidy Australian Nuclear Science and Technology Organization, NSW 2234, Australia
  • G.E. Gadd Australian Nuclear Science and Technology Organization, NSW 2234, Australia
  • S. Moricca Australian Nuclear Science and Technology Organization, NSW 2234, Australia
  • B. Sundqvist Department of Experimental Physics, Umea University, SE-90187 Umea, Sweden

DOI:

https://doi.org/10.1063/1.1925374

Ключові слова:

PACS: 81.05.Tp, 62.20.Qp, 81.40.Cd

Анотація

The Vickers microhardness of Xe-intercalated polycrystalline fullerite C60 (Xex C60, x ≃ 0.35) is measured in a moderately low temperature range of 77 to 300 K. A high increase in the microhardness of the material (by a factor of 2 to 3) as compared to that of pure C60 single crystals is observed. It is shown that the step-like anomaly in the temperature dependences of the microhardness of pure C60 single crystals recorded under the orientational fcc-sc phase transition (Tc ≃ 260 K) is also qualitatively retained for Xex C60, but its onset is shifted by 40 K towards lower temperatures and the step becomes less distinct and more smeared. This behavior of H̅V(T)correlates with x-ray diffraction data, the analysis of which revealed a considerable influence of xenon interstitial atoms on the peculiar features of fullerite thermal expansion due to orientational phase transitions (see the paper by A.I. Prokhvatilov et al. in this issue).

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Опубліковано

2005-03-21

Як цитувати

(1)
Fomenko, L.; Lubenets, S.; Natsik, V.; Cassidy, D.; Gadd, G.; Moricca, S.; Sundqvist, B. Low Temperature Microhardness of Xe-Intercalated Fullerite C60. Fiz. Nizk. Temp. 2005, 31, 596-601.

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Низькотемпеpатуpна фізика пластичності та міцності

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