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TT: Tiefe Temperaturen

TT 25: Correlated Electrons - Poster Session

TT 25.105: Poster

Mittwoch, 29. März 2006, 14:30–18:30, P1

Theoretical investigation of the magnetic properties of J-alternating chains of monometallic complexes — •Sebastian Fuchs and Thomas Pruschke — Institut für Theoretische Physik, Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen

Monometallic complexes containing Ni with spin S=1 can be coupled via nitrit bridges to form chains with variable exchange coupling strengths between the Ni spins. We study the magnetic, i.e susceptibility and effective moment with and without external field, and thermodynamic properties of one particular system with three different couplings controlled through the orientation of the nitrit group. We estimate the relative strenghts of the couplings necessary to model the experimental data. Predictions for possible dynamical properties observable in Neutron scattering experiments are also made.