O. Waldmann, C. Dobe, H. Mutka, A. Furrer and H. U. Güdel
Néel-Vector Tunneling in Antiferromagnetic Molecular Clusters
Phys. Rev. Lett. 95, 057202/1-4 (2005)                 

Abstract: From inelastic neutron scattering experiments, we demonstrate quantum tunneling of the Néel vector in the antiferromagnetic molecular ferric wheel CsFe₈. Analysis of the linewidth of the tunneling transition evidences coherent tunneling.