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Low temperature spin dynamics in Cr7Ni-Cu-Cr7Ni coupled molecular rings

TitleLow temperature spin dynamics in Cr7Ni-Cu-Cr7Ni coupled molecular rings
Publication TypeJournal Article
Year of Publication2014
AuthorsBordonali, L, Furukawa, Y, Mariani, M, Sabareesh, KPV, Garlatti, E, Carretta, S, Lascialfari, A, Timco, G, Winpenny, REP, Borsa, F
JournalJournal of Applied Physics
Date Published05
Type of ArticleArticle
ISBN Number0021-8979
Accession NumberWOS:000335643700475

Proton Nuclear Magnetic Resonance (NMR) relaxation measurements have been performed down to very low temperature (50 mK) 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 1.5 K. At lower temperature, the H-1-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 (260 mK) in the coupled ring with respect to the single Cr7Ni ring (140 mK). (C) 2014 AIP Publishing LLC.

Custom 1

Complex States

Custom 2

Nanoscale and Ultrafast