3000 % high-field magnetoresistance in super-lattices of CoFe nanoparticles

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dc.creatorTan, Reasmey P.
dc.creatorCarrey, Julian
dc.creatorRespaud, Marc
dc.creatorDesvaux, Celine
dc.creatorRenaud, Philippe
dc.creatorChaudret, Bruno
dc.date2007-10-09
dc.date.accessioned2026-07-07T09:25:27Z
dc.date.available2026-07-07T09:25:27Z
dc.descriptionWe report on magnetotransport measurements on millimetre-large super-lattices of CoFe nanoparticles surrounded by an organic layer. Electrical properties are typical of Coulomb blockade in three dimensional arrays of nanoparticles. A large high-field magnetoresistance, reaching up to 3000 %, is measured between 1.8 and 10 K. This exceeds by two orders of magnitude magnetoresistance values generally measured in arrays of 3d metals ferromagnetic nanoparticles. The magnetoresistance amplitude scales with the magnetic field / temperature ratio and displays an unusual exponential dependency with the applied voltage. The magnetoresistance abruptly disappears below 1.8 K. We propose that the magnetoresistance is due to some individual paramagnetic moments localized between the metallic core of the nanoparticles, the origin of which is discussed.
dc.description9 pages (text, references, figures and legends)
dc.identifierhttps://arxiv.org/abs/0710.1750
dc.identifierhttp://arxiv.org/abs/0710.1750
dc.identifierJ. Magn. Magn. Mater. 320, L55 (2008)
dc.identifierdoi:10.1016/j.jmmm.2007.11.010
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/156413
dc.subjectMaterials Science
dc.title3000 % high-field magnetoresistance in super-lattices of CoFe nanoparticles
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