Breakdown of the Giant Spin Model in the Magnetic Relaxation of the Mn6 Nanomagnets

S. Carretta, T. Guidi, P. Santini, G. Amoretti, O. Pieper, B. Lake, J. van Slageren, F. El Hallak, W. Wernsdorfer, H. Mutka, M. Russina, C. J. Milios, E. K. Brechin