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Science 7 June 1991:
Vol. 252. no. 5011, pp. 1415 - 1417
DOI: 10.1126/science.252.5011.1415
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Articles

A Room-Temperature Molecular/Organic-Based Magnet

JUAN M. MANRIQUEZ 1, GORDON T. YEE 1, R. SCOTT MCLEAN 2, ARTHUR J. EPSTEIN 3, and JOEL S. MILLER 2

1 Central Research and Development, Experimental Station, Du Pont, Wilmington, DE 19880-0328, and Departments of Physics and of Chemistry, Ohio State University, Columbus, OH 43210-1106
2 Central Research & Development, Experimental Station, Du Pont, Wilmington, DE 19880-0328
3 Departments of Physics and of Chemistry, Ohio State University, Columbus, OH 43210-1106

The reaction of bis(benzene)vanadium with tetracyanoethylene, TCNE, affords an insoluble amorphous black solid that exhibits field-dependent magnetization and hysteresis at room temperature. The critical temperature could not be estimated as it exceeds 350 kelvin, the thermal decomposition temperature of the sample. The empirical composition of the reported material is V(TCNE)x·Y(CH2Cl2) with x sim 2 and Y sim 1/2. On the basis of the available magnetic and infrared data, threedimensional antiferromagnetic exchange of the donor and acceptor spins resulting in ferrimagnetic behavior appears to be the mode of magnetic coupling.

Submitted on April 24, 1991
Accepted on May 2, 1991


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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