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Science 19 July 1991:
Vol. 253. no. 5017, pp. 301 - 302
DOI: 10.1126/science.253.5017.301
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Articles

Organic Molecular Soft Ferromagnetism in a Fullerene C60

PIERRE-MARC ALLEMAND 1, KISHAN C. KHEMANI 1, ANDREW KOCH 1, FRED WUDL 1, KAROLY HOLCZER 2, STEVEN DONOVAN 2, GEORGE GRÜNER 2, and JOE D. THOMPSON 3

1 Departments of Chemistry and Physics and Institute for Polymers and Organic Solids, University of California, Santa Barbara, CA 93106
2 Department of Physics, University of California, Los Angeles, CA 90024
3 Los Alamos National Laboratory, Los Alamos, NM 87545

The properties of an organic molecular ferromagnet [C60TDAE0.86; TDAE is tetrakis(dimethylamino)ethylene] with a Curie temperature ;Tc = 16.1 kelvin are described. The ferromagnetic state shows no remanence, and the temperature dependence of the magnetization below ;Tc does not follow the behavior expected of a conventional ferromagnet. These results are interpreted as a reflection of a three-dimensional system leading to a soft ferromagnet.

Submitted on June 3, 1991
Accepted on June 26, 1991


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