title: A binuclear Fe(III)Dy(III) single molecule magnet. Quantum effects and models.
abstract: The binuclear [FeIII(bpca)(mu-bpca)Dy(NO3)4], having Single Molecule Magnet (SMM) properties, belonging to a series of isostructural FeIIILnIII complexes (Ln = Eu, Gd, Tb, Dy, Ho) and closely related FeIILnIII chain structures, was characterized in concise experimental and theoretical respects. The low temperature magnetization data showed hysteresis and tunneling. The anomalous temperature dependence of Mössbauer spectra is related to the onset of magnetic order, consistent with the magnetization relaxation time scale resulting from AC susceptibility measurements. The advanced ab initio calculations (CASSCF and spin-orbit) revealed the interplay of ligand field, spin-orbit, and exchange effects and probed the effective Ising nature of the lowest states, involved in the SMM and tunneling effects.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
authors.forename: Marilena
authors.initials: M
authors.lastname: Ferbinteanu
authors.forename: Takashi
authors.initials: T
authors.lastname: Kajiwara
authors.forename: Kwang-Yong
authors.initials: KY
authors.lastname: Choi
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Nojiri
authors.forename: Akio
authors.initials: A
authors.lastname: Nakamoto
authors.forename: Norimichi
authors.initials: N
authors.lastname: Kojima
authors.forename: Fanica
authors.initials: F
authors.lastname: Cimpoesu
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Fujimura
authors.forename: Shinya
authors.initials: S
authors.lastname: Takaishi
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yamashita