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1993 | 84 | 6 | 1117-1123
Article title

Free Radicals in K and Rb Admixtured Fullerene C_{60}

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Languages of publication
EN
Abstracts
EN
Molecules of C_{60} form Van der Waals type crystals. The observations reported here concern EPR investigations of such C_{60} samples with only a slight amount of Rb or K. Detected defects are (C_{60})^{+} or (C_{60})^{y-} ion-radicals. A hole (h) or trapped electron (t) are localized on one fullerene ball. In the case of potassium fullerites C_{60}:K the line shape of EPR signal was of the Dysonian form which is characteristic of conducting electrons in metal. The EPR lines of holes (C_{60})^{+} are characterized by g_{h} ≥ g_{0} whereas for electrons g_{t} is below the value g_{0} = 2.0023 characteristic of a free electron (g_{t} ≤ g_{0}). The EPR linewidth 2ΔB^{h}_{1s} of the (C_{60})^{+} weakly increased with decreasing temperature whereas the EPR linewidth attributed to the electron 2ΔB^{t}_{1s} significantly decreases with decreasing temperature. The C_{60}:K sample reached superconducting phase below T_{c} = 11 K which is significantly less than T_{c} = 16.5 K observed for K_{x}C_{60} where 2 ≤ x ≤ 4.
Keywords
EN
Publisher

Year
Volume
84
Issue
6
Pages
1117-1123
Physical description
Dates
published
1993-12
received
1993-07-12
(unknown)
1993-10-11
Contributors
author
  • Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
author
  • Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
author
  • Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland
author
  • Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
References
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv84z613kz
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