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Enhancing the Quantum Properties of Manganese–Lanthanide Single-Molecule Magnets: Observation of Quantum Tunneling Steps in the Hysteresis Loops of a {Mn12Gd} Cluster


  • This work was supported by the U.S. National Science Foundation (Grant CHE-0414555 to GC). The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the US Department of Energy under Contract No. DE-AC02-05CH11231.


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Quantum tunneling of magnetization (QTM) steps have been observed for a mixed 3d–4f single-molecule magnet for the first time in the hysteresis loops of {Mn12Gd}. This phenomenon is assigned to larger than usual exchange coupling of the 4f atom with the {Mn12} shell. This improved quantum behavior for the important class of SMMs opens up the prospects for its detailed study using hysteresis methods. Gd purple, Mn(II) yellow, Mn(III) blue, O red, N green.