Naslov
Orientational and Magnetic Ordering of Buckyballs in TDAE-C60

Autori
Mihailovic, Dragan ; Arcon, Denis ; Venturini, P. ; Blinc, Robert ; Omerzu, Aleš ; Cevc, Pavel

Izvornik
Science (0036-8075) 268 (1995), 5209; 400-402

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

Ključne riječi
phase-transitions ; C-60

Sažetak
Spin ordering in the low-temperature magnetic phase is directly linked to the orientational ordering of C-60 molecules in organically doped fullerene derivatives. Electron spin resonance and alternating current susceptometry measurements on tetrakis(dimethylamino)ethylene-C-60 (TDAE-C- 60) (Curie temperature T-c = 16 kelvin) show a direct coupling between spin and merohedral degrees of freedom. This coupling was experimentally demonstrated by showing that ordering the spins in the magnetic phase imprints a merohedral order on the solid or, conversely, that merohedrally ordering the C-60 molecules influences the spin order at low temperature. The merohedral disorder gives rise to a distribution of pi-electron exchange interactions between spins on neighboring C-60 molecules, suggesting a microscopic origin for the observed spin-glass behavior of the magnetic state.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Interdisciplinarne prirodne znanosti

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