S. T. Ochsenbein, O. Waldmann, A. Sieber, G. Carver, R. Bircher, H. U. Güdel, R. S. G. Davies, G. A. Timco, R. E. P. Winpenny, H. Mutka and F. Fernandez-Alonso
Standing spin waves in an antiferromagnetic molecular Cr₆ horseshoe
Europhys. Lett. 79, 17003/1-6 (2007)                 

Abstract: The antiferromagnetic molecular finite chain Cr₆ was studied by inelastic neutron scattering. The observed magnetic excitations at 2.6 and 4.3 meV correspond, due to the open boundaries of a finite chain, to standing spin waves. The determined energy spectrum revealed an essentially classical spin structure. Hence, various spin-wave theories were investigated in order to assess their potential for describing the elementary excitations of finite spin systems.