Proton Nuclear Magnetic Resonance (NMR) relaxation measurements have been performed down to very low temperature (50mK) to determine the effect of coupling two Cr7Ni molecular rings via a Cu2+ ion. No difference in the spin dynamics was found from nuclear spin lattice relaxation down to 1.5K. At lower temperature, the 1H-NMR line broadens dramatically indicating spin freezing. From the plot of the line width vs. magnetization, it is found that the freezing temperature is higher (260mK) in the coupled ring with respect to the single Cr7Ni ring (140 mK).
L. Bordonali, Y. Furukawa, M. Mariani, K. P. V. Sabareesh, E. Garlatti, S. Carretta, et al. (2014). Low temperature spin dynamics in Cr7Ni-Cu-Cr7Ni coupled molecular rings. JOURNAL OF APPLIED PHYSICS, 115, 17E102-1-17E102-3 [10.1063/1.4853255].
Low temperature spin dynamics in Cr7Ni-Cu-Cr7Ni coupled molecular rings
MARIANI, MANUEL;
2014
Abstract
Proton Nuclear Magnetic Resonance (NMR) relaxation measurements have been performed down to very low temperature (50mK) to determine the effect of coupling two Cr7Ni molecular rings via a Cu2+ ion. No difference in the spin dynamics was found from nuclear spin lattice relaxation down to 1.5K. At lower temperature, the 1H-NMR line broadens dramatically indicating spin freezing. From the plot of the line width vs. magnetization, it is found that the freezing temperature is higher (260mK) in the coupled ring with respect to the single Cr7Ni ring (140 mK).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
