Naslov
Magnetic resonance of the weak organic magnet TDAE-C60

Autori
Blinc, R. ; Arĉon, D. ; Cevc, P. ; Mihailović, D. ; Omerzu, A.

Izvornik
Applied Magnetic Resonance (0937-9347) 11 (1996), 2; 203-228

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
FERROMAGNETISM ; TRANSITION ; NMR ; C-60

Sažetak
The charge transfer compound TDAE-C-60 (TDAE = tetrakis-dimethylamino-ethylene) is so far the only known C-60 based molecular ferromagnet. The ESR spectra of TDAE-C-60 single crystals demonstrate that freshly grown regularly shaped single crystals show at first an AFM (antiferromagnetic)-like behavior which changes upon annealing at room temperature in vacuum to a FM (ferromagnetic) one. It thus seems that annealing induces a change in the relative orientation of the distorted C-60(-) ions resulting in a change in the sign of the effective magnetic interactions between neighboring C-60(-) ions. A structural transition in the TDAE methyl protons at 250 K seems to be connected with this process. Here we review the structure, the ESR spectra, the proton NMR spectra and the C-13 NMR spectra of TDAE-C-60.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Interdisciplinarne prirodne znanosti

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