Conductance and EPR study of the endohedral fullerene Li@C60

Vladimir Popok, I.I. Azarko, A.V. Gromov, M. Jönsson, A. Lassesson, Eleanor E.B. Campbell

Research output: Contribution to journalJournal articleResearchpeer-review

31 Citations (Scopus)

Abstract

Thin films and bulk samples of endohedral fullerenes Li@C60 are studied using current-voltage (I-V) measurements and electron paramagnetic resonance (EPR). Electrical measurements show a linear behaviour for the I-V curves and give an average resistivity of ca. 1.5 kOhm.cm for thin Li@C60 films deposited in vacuum, four orders of magnitude lower than C60 samples. A drastic effect on the conductance, lowering it to the values typical for C60, is observed when the Li@C60 samples are exposed to ambient atmosphere. No additional paramagnetic centres (PCs) are found for the Li@C60 compared to C60 that can be related to the formation of dimers or trimers of the endohedral fullerene molecules. However, the presence of the Li atoms in the fullerene cages contributes to a change of the spin-spin and spin-lattice relaxation times. The spin-lattice relaxation time becomes 4 orders of magnitude longer compared to the spin-spin relaxation time.
Original languageEnglish
JournalSolid State Communications
Volume133
Issue number8
Pages (from-to)499–503
Number of pages4
ISSN0038-1098
DOIs
Publication statusPublished - Feb 2005
Externally publishedYes

Keywords

  • fullerenes
  • Electronic transport
  • electron paramagnetic resonance

Fingerprint

Dive into the research topics of 'Conductance and EPR study of the endohedral fullerene Li@C60'. Together they form a unique fingerprint.

Cite this