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Berlin 2008 – scientific programme

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MA: Fachverband Magnetismus

MA 27: Bio- and Molecular Magnetism

MA 27.1: Talk

Thursday, February 28, 2008, 14:30–14:45, EB 202

Can large magnetic anisotropy and high spin really coexist?Eliseo Ruiz1, Jordi Cirera1, Joan Cano1,2, Santiago Alvarez1, •Claudia Loose3, and Jens Kortus31Departament de Quimica Inorgánica and Institut de Recerca de Quimica Teórica i Computacional, Universitat de Barcelona, Diagonal 647,08028 Barcelona, Spain — 2Institució Catalana de Recera i Estudis Avancats, Spain — 3Institut für Theoretische Physik, TU Bergakademie Freiberg, Leipziger Str. 23, D-09599 Freiberg, Germany

This theoretical study discusses the interplay of the magnetic anisotropy and magnetic exchange interaction of two Mn6 complexes. Our results for two polynuclear Mn6 complexes show a very strong dependence of the D value on the spin of the ground state while the energy barriers are practically constant. Thus, complex 2 with a large spin (S = 12) favoured by ferromagnetic interactions has a small D value, while the lower spin complex 1 (S = 4) has a large D value. Therefor we suggest, that a large magnetic anisotropy is not favoured by a high spin state of the ground state.

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