The role of TDAE for the magnetism in [TDAE]C60

Details The role of TDAE for the magnetism in [TDAE]C60 The role of TDAE for the magnetism in [TDAE]C60

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999njph....1....5s&link_type=abstract

New Journal of Physics, Volume 1, Issue 1, pp. 5 (1999).

Physics

1

Scientific paper

The mechanism leading to the outstanding magnetic property of the organic charge-transfer salt (TDAE+.C60-.) is still a matter of discussion. The scope of this paper is to explore the role of (TDAE+.) for the magnetic ordering below TC = 16 K and to find a model which is in accordance with the experimental findings. Therefore besides (TDAE+.C60-.) we synthesized slightly altered compounds by either perdeuterating TDAE or replacing C60 by C70 in various concentrations. The magnetic ordering and the electric transport properties in these systems are investigated between 4 and 300 K by ac-susceptibility, ESR, NMR and microwave conductivity. As a result, itinerant magnetic moments can be excluded in the whole temperature range and the (TDAE+.) radical ion is coupled with (C60-.) by strong spin-exchange and has to be taken into account for a description of the magnetic ordering. Microscopic models assuming a second charge transfer seem to be an appropriate way to describe the experimental results.

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