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A New Mechanism For Ferromagnetism In C-60-TDAE

Srinivasan, B and Ramasesha, S (1995) A New Mechanism For Ferromagnetism In C-60-TDAE. In: Fullerene Science And Technology, 3 (6). pp. 747-754.

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Based on the topology of C-60 and the resulting non-disjoint nature of the lowest unoccupied molecular orbitals, Ne propose a new model for ferromagnetic exchange in C-60-TDAE. Within the Hubbard model, we find that the ferromagnetic exchange integral is stabilized to first order in the inter-ball transfer integral, while the antiferromagnetic coupling is stabilized only to second order. This difference is adequate to counter the larger phase space available for stabilizing the antiferromagnetic state. Thus, the ground state is found to be ferromagnetic for reasonable inter-ball transfer integrals.

Item Type: Journal Article
Publication: Fullerene Science And Technology
Publisher: Marcel Dekker Inc
Additional Information: Copyright of this article belongs to Marcel Dekker Inc.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 02 Apr 2009 04:58
Last Modified: 02 Apr 2009 04:58
URI: http://eprints.iisc.ac.in/id/eprint/19279

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