Magnetic behavior of a spin-1 dimer: model system for homodinuclear nickel (II) complexes

Details Magnetic behavior of a spin-1 dimer: model system for homodinuclear nickel (II) complexes Magnetic behavior of a spin-1 dimer: model system for homodinuclear nickel (II) complexes

2005-05-26

arxiv.org/abs/cond-mat/0505636v2

J. Phys. Chem. Solids 66 (2005) 1828

Physics

Condensed Matter

Materials Science

20 pages, 7 figures

Scientific paper

10.1016/j.jpcs.2005.09.089

Magnetic behavior of a spin-1 Heisenberg dimer is analysed in dependence on both uniaxial single-ion anisotropy and XXZ exchange anisotropy in a zero- as well as non-zero longitudinal magnetic field. A complete set of eigenfunctions and eigenvalues of the total Hamiltonian is presented together with an exact analytical expression for the Gibbs free energy, longitudinal magnetization, longitudinal and transverse susceptibility. The obtained theoretical results are compared with the relevant experimental data of [Ni2(Medpt)2(ox)(H2O)2](ClO4)2.2H2O (Medpt = methyl-bis(3-aminopropyl)amine).

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