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Ordered magnetic arrays of cobalt SMM: properties and the relationship with crystal symmetry and SMM environment

AuthorsTomás, Milagros ; Sáenz de Pipaón, C.; Forcén-Vázquez, E.; Mayoral, Isabel; Falvello, Larry R.; Campo, Javier; Palacio, Fernando
Issue Date2012
CitationICM 2012
AbstractThe modulation of the magnetic properties of SMMs and their organization in extended magnetic arrays are, at the present, some of the top areas in the field of molecular magnetism for the implication in the improvement of the physical properties of the SMM and the potential use in devices such as for data storage. Few polymers of SMM have been structurally characterized in spite of the number of known SMM. [Co4citrate4]8- cubanes can behave as SMM. We have reported recently the union of these cubanes through “Co(H2O)2ETG” (ETG=ethylene glycol) bridges and the formation of anionic 2D layers. These layers crystallize in the tetragonal system, P-421c space group, with counterions (Cs+ or Rb+), water and ETG molecules connecting the layers though electrostatic interactions and hydrogen bridges. The magnetic studies show the co-existence of two magnetic nets: the SMM net and the one formed by the bridged cobalt atoms and also shows the influence of the counterions in the layer magnetic properties. Two intriguing relaxation processes with different characteristics timescales are observed. Moreover, [Co4citrate4]8- cubanes can also organize in 3D, diamond-like structural arrays showing SMM magnetic behaviour below 6K with an enegry barrier of 54K and magnetic ordering below 2.7K.
DescriptionResumen del póster presentado a la 19th International Conference on Magnetism celebrada en Korea del 8 al 13 de julio de 2012.
Appears in Collections:(ISQCH) Comunicaciones congresos
(ICMA) Comunicaciones congresos
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