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2010 | 8 | 1 | 101-112
Tytuł artykułu

Magnetic and structural anomalies of NanC60 (n = 2, 3)

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Sodium fullerides NanC60 (n = 2, 3) have been synthesized by a liquid phase reaction and investigated with X-ray diffraction (XRD), nuclear magnetic resonance (NMR), electron paramagnetic resonance, and differential thermal analysis. XRD data indicate that the crystal structure of Na2C60 at 300 K is face centered cubic (FCC). A phase transition from primitive cubic to FCC crystal structure has been observed in this work in Na2C60 fulleride at 290 K. The transition is accompanied by the step-like change of paramagnetic susceptibility. The crystal structure of Na3C60 is more complicated than, and different from, what has been reported in the literature. A nearly seven-fold increase of paramagnetic susceptibility with increasing temperature has been observed in the Na3C60 fulleride at 240–260 K. In the same temperature range, a new line at about 255 ppm appears in the 23Na NMR spectrum, indicating a significant increase of electron density near the Na nucleus. The observed effect can be explained by a metal-insulator transition caused by a structural transition.
Wydawca

Czasopismo
Rocznik
Tom
8
Numer
1
Strony
101-112
Opis fizyczny
Daty
wydano
2010-02-01
online
2009-11-15
Twórcy
  • Department of Physics, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia, kulb@mig.phys.msu.ru
  • Department of Chemistry, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia
  • Department of Physics, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia
  • Department of Physics, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia
  • Institute of General and Inorganic Chemistry RAS, Moscow, Russia
  • Department of Chemistry, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia
  • Department of Chemistry, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia
  • Institute of General and Inorganic Chemistry RAS, Moscow, Russia
  • Department of Physics, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11534-009-0081-1
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