High-field and low field magnetoresistance of CoFe nanoparticles elaborated by organometallic chemistry

Details High-field and low field magnetoresistance of CoFe nanoparticles elaborated by organometallic chemistry High-field and low field magnetoresistance of CoFe nanoparticles elaborated by organometallic chemistry

2008-02-07

arxiv.org/abs/0802.1018v1

J. Appl. Phys. 103, 07F317 (2008)

Physics

Condensed Matter

Materials Science

12 pages, with 3 figures, references and figure captions. Proceeding of the 52nd MMM conference

Scientific paper

10.1063/1.2838621

We report on magnetotransport measurements on CoFe nanoparticles surrounded by an insulating organic layer. Samples were obtained by evaporating a solution of nanoparticles on a patterned substrate. Typical behaviour of Coulomb blockade in array of nanoparticles is observed. High and low field magnetoresistance 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 tunnelling magnetoresistance is observed.

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