Velkos, GeorgicsKrylov, Denis S.Kirkpatrick, KyleSpree, LukasDubrovin, VasiliiBuechner, BerndAvdoshenko, Stanislav M.Bezmelnitsyn, ValeriyDavis, SeanFaust, PaulDuchamp, JamesDorn, Harry C.Popov, Alexey A.2019-08-292019-08-292019-04-231433-7851http://hdl.handle.net/10919/93298The azafullerene Tb-2@C79N is found to be a single-molecule magnet with a high 100-s blocking temperature of magnetization of 24 K and large coercivity. Tb magnetic moments with an easy-axis single-ion magnetic anisotropy are strongly coupled by the unpaired spin of the single-electron Tb-Tb bond. Relaxation of magnetization in Tb-2@C79N below 15 K proceeds via quantum tunneling of magnetization with the characteristic time tau(QTM)=16462 +/- 1230 s. At higher temperature, relaxation follows the Orbach mechanism with a barrier of 757 +/- 4 K, corresponding to the excited states, in which one of the Tb spins is flipped.application/pdfenCreative Commons Attribution-NonCommercial 4.0 Internationalendohedral fullerenesexchange couplingmetal-metal bondssingle-molecule magnetsterbiumHigh Blocking Temperature of Magnetization and Giant Coercivity in the Azafullerene Tb-2@C79N with a Single-Electron Terbium-Terbium BondArticle - RefereedAngewandte Chemie-International Editionhttps://doi.org/10.1002/anie.2019009435818307861251521-3773