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Beltlike C(60)(-) electron spin density distribution in the organic ferromagnet TDAE-C(60)
Robert Blinc1, Peter Jeglic, Tomaz Apih
1Department of Solid State Physics, Institute Jozef Stefan, Jamova 39, 1000 Ljubljana, Slovenia.
Physical Review Letters
|February 28, 2002
Abstract:
The observed huge increase in the width of the (3C)NMR spectra of TDAE-C(0 )n the middle of the ferromagnetic phase at 10 K is due to a Jahn-Teller distortion of the C(60 )(-) which becomes visible in view of the resulting changes in the Fermi contact electron-(13)C NMR shifts. The shape of the (13)C spectra allows for a direct determination of the belt-like redistribution of the unpaired electron spin density on the C(60)(-) ions, which is responsible for the relatively high ferromagnetic transition temperature in this purely organic system.