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Phys Rev Lett. 2003 Dec 5;91(23):237202. Epub 2003 Dec 4.

Elementary excitations in the cyclic molecular nanomagnet Cr8.

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1
Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA. waldmann@mps.ohio-state.edu

Abstract

Combining recent and new inelastic neutron scattering data for the molecular cyclic cluster Cr8 produces a deep understanding of the low lying excitations in bipartite antiferromagnetic Heisenberg rings. The existence of the L band, the lowest rotational band, and the E band, essentially spin wave excitations, is confirmed spectroscopically. The different significance of these excitations and their physical nature is clearly established by high-energy and Q-dependence data.

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