Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 21 April 1995:
Vol. 268. no. 5209, pp. 400 - 402
DOI: 10.1126/science.268.5209.400
Prev | Table of Contents | Next

Articles

Orientational and Magnetic Ordering of Buckyballs in TDAE-C60

D. Mihailovic 1, D. Arcon 1, P. Venturini 1, R. Blinc 1, A. Omerzu 1, and P. Cevc 1

1 Jozef Stefan Institute, Jamova 39, Ljubljana, Slovenia

Spin ordering in the low-temperature magnetic phase is directly linked to the orientational ordering of C60 molecules in organically doped fullerene derivatives. Electron spin resonance and alternating current susceptometry measurements on tetrakis(dimethylamino)ethylene-C60 (TDAE-C60) (Curie temperature Tc = 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 C60 molecules influences the spin order at low temperature. The merohedral disorder gives rise to a distribution of pgr-lectron exchange interactions between spins on neighboring C60 molecules, suggesting a microscopic origin for the observed spinglass behavior of the magnetic state.

Submitted on October 5, 1994
Accepted on February 1, 1995

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)