Physics – Condensed Matter – Materials Science
Scientific paper
2007-10-09
Phys. Rev.Lett. 99, 176805 (2007)
Physics
Condensed Matter
Materials Science
9 pages (text, figures, figures legends and references). 3 figures reference 33 added : "arXiv:0710.1750v1"
Scientific paper
10.1103/PhysRevLett.99.176805
We report on magnetotransport measurements on millimetric super-lattices of Co-Fe nanoparticles surrounded by an organic layer. At low temperature, the transition between the Coulomb blockade and the conductive regime becomes abrupt and hysteretic. The transition between both regime can be induced by a magnetic field, leading to a novel mechanism of magnetoresistance. Between 1.8 and 10 K, high-field magnetoresistance due to magnetic disorder at the surface of the particles is also observed. Below 1.8 K, this magnetoresistance abruptly collapses and a low-field magnetoresistance is observed.
Carrey Julian
Chaudret Bruno
Desvaux Celine
Grisolia Jeremie
Renaud Philippe
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