Muon spin relaxation studies of iron(II) spin crossover complexes |
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| Authors: | Yann Garcia Stewart J Campbell James S Lord Philipp Gütlich |
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| Institution: | 1. Unité de Chimie des Matériaux Inorganiques et Organiques, Département de Chimie, Faculté des Sciences, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium;2. School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia;3. ISIS, Rutherford Appleton Laboratory, Chilton, Didcot OX11 OQX, UK;4. Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, 55099 Mainz, Germany |
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| Abstract: | A series of model iron(II) spin crossover complexes have been investigated by temperature dependent muon spin relaxation (μSR) techniques at ISIS, UK. The thermally induced spin crossover in these materials could be monitored by following the initial asymmetry parameter, a0, in zero-field. We established that the behavior of a0 correlates well with the shape of the spin crossover curve derived from magnetic susceptibility measurements, whether hysteretic, smooth, or abrupt. In addition, the longitudinal field dependence of a0 not only provides information on the nature of the muonic species but also on their interactions and respective localization in the crystal lattice. Useful insights to the electronic structure and dynamic phenomena of these model spin crossover complexes can be derived. |
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