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

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

2001-09-20

arxiv.org/abs/cond-mat/0109380v1

Inorganic Chemistry; 2001; 40(9); 2127-2146

Physics

Condensed Matter

64 pages, 18 figures

Scientific paper

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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