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Serrano-Guisan S, di Domenicantonio G, Abid M, et al. Enhanced magnetic field sensitivity of spin-dependent transport in cluster-assembled metallic nanostructures. Nat Mater. 2006;5(9):730-4doi: 10.1038/nmat1713.
Serrano-Guisan, S., di Domenicantonio, G., Abid, M., Abid, J. P., Hillenkamp, M., Gravier, L., Ansermet, J. P., & Félix, C. (2006). Enhanced magnetic field sensitivity of spin-dependent transport in cluster-assembled metallic nanostructures. Nature materials, 5(9), 730-4. https://doi.org/10.1038/nmat1713
Serrano-Guisan, Santiago, et al. "Enhanced magnetic field sensitivity of spin-dependent transport in cluster-assembled metallic nanostructures." Nature materials vol. 5,9 (2006): 730-4. doi: https://doi.org/10.1038/nmat1713
Serrano-Guisan S, di Domenicantonio G, Abid M, Abid JP, Hillenkamp M, Gravier L, Ansermet JP, Félix C. Enhanced magnetic field sensitivity of spin-dependent transport in cluster-assembled metallic nanostructures. Nat Mater. 2006 Sep;5(9):730-4. doi: 10.1038/nmat1713. Epub 2006 Aug 13. PMID: 16906140.
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Nat Mater. 2006 Sep;5(9):730-4. doi: 10.1038/nmat1713. Epub 2006 Aug 13.

Enhanced magnetic field sensitivity of spin-dependent transport in cluster-assembled metallic nanostructures.

Nature materials

Santiago Serrano-Guisan, Giulia di Domenicantonio, Mohamed Abid, Jean-Pierre Abid, Matthias Hillenkamp, Laurent Gravier, Jean-Philippe Ansermet, Christian Félix

Affiliations

  1. Laboratoire de Physique des Matériaux Nanostructurés, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne-EPFL, Switzerland.

PMID: 16906140 DOI: 10.1038/nmat1713

Abstract

The emerging field of spintronics explores the many possibilities offered by the prospect of using the spin of the electrons for fast, nanosized electronic devices. The effect of magnetization acting on a current is the essence of giant or tunnel magnetoresistance. Although such spintronics effects already find technological applications, much of the underlying physics remains to be explored. The aim of this article is to demonstrate the importance of spin mixing in metallic nanostructures. Here we show that magnetic clusters embedded in a metallic matrix exhibit a giant magnetic response of more than 500% at low temperature, using a recently developed thermoelectric measurement. This method eliminates the dominating resistivity component of the magnetic response and thus reveals an intrinsic spin-dependent process: the conduction-electron spin precession about the exchange field as the electron crosses the clusters, giving rise to a spin-mixing mechanism with strong field dependence. This effect appears sensibly only in the smallest clusters, that is, at the level of less than 100 atoms per cluster.

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