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arxiv: cond-mat/0109380 · v1 · submitted 2001-09-20 · ❄️ cond-mat

Single-Molecule Magnets: Jahn-Teller Isomerism and the Origin of Two Magnetization Relaxation Processes in Mn12 Complexes

Sheila M. J. Aubin , Ziming Sun , Hilary J. Eppley , Evan M. Rumberger , Ilia A. Guzei , Kirsten Folting , Peter K. Gantzel , Arnold L. Rheingold
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George Christou David N. Hendrickson
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classification ❄️ cond-mat
keywords magnetizationmn12complexesjahn-tellermagnetsoriginprocessesregion
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New Mn12 single-molecule magnets (SMM's) with the composition [Mn12O12(O2CR)16(H2O)4] were prepared and structurally characterized. Complexes of this type can exhibit two out-of-phase ac magnetic susceptibility signals, one in the 4-7 K region and the other in the 2-3 K region. The origin of the two magnetization relaxation processes was systematically examined. The X-ray structures of two isomeric forms of a Mn12 SMM are given. One complex has an abnormal Jahn-Teller distortion axis. The magnetization hysteresis loops for the two isomers are quite different.

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