High-field and low-field magnetoresistances of CoFe nanoparticles elaborated by organometallic chemistry
- 13 March 2008
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 103 (7), 07F317
- https://doi.org/10.1063/1.2838621
Abstract
We report on magnetotransportmeasurements on CoFe nanoparticles surrounded by an insulating organic layer. Samples were obtained by evaporating a solution of nanoparticles on a patterned substrate. Typical behavior of Coulomb blockade in array of nanoparticles is observed. High- and low-field magnetoresistances have been evidenced. Below 10 K , a large high-field magnetoresistance is measured, reaching up to 500%. Its amplitude decreases strongly with increasing voltage. At 1.6 K , this high-field magnetoresistance vanishes and an inverse low-field tunnelingmagnetoresistance is observed.Keywords
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