Graphene enhances the magnetoresistance of FeNi3 nanoparticles in hierarchical FeNi3–graphene nanocomposites

G. Abellán; H. Prima-García; E. Coronado

doi:10.1039/C5TC04445F

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Graphene enhances the magnetoresistance of FeNi₃ nanoparticles in hierarchical FeNi₃–graphene nanocomposites†

G. Abellán,‡^ab H. Prima-García ‡^a and E. Coronado*^a

Author affiliations

* Corresponding authors

^a Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán 2, 46890 Paterna, Spain
E-mail: eugenio.coronado@uv.es
Fax: +34 96 354 3273
Tel: +34 96 354 4419

^b Department of Chemistry and Pharmacy and Institute of Advanced Materials and Processes (ZMP), University Erlangen-Nürnberg, Henkestr. 42, 91054 Erlangen and Dr.-Mack Str. 81, 90762 Fürth, Germany

Abstract

An increase in the giant magnetoresistance of FeNi₃ nanoparticles of 20 times has been observed in FeNi₃–graphene nanocomposites synthesized using NiFe-layered double hydroxide hybrids as precursors. The magnetic, transport and magneto-transport properties of these nanocomposites are studied and compared with those of the pure FeNi₃ nanoparticles. The hierarchical structure and hybrid composition of these magnetic nanocomposites lead to the observation of two unusual magneto-transport properties, namely (i) an enhancement in the low-field magnetoresistance effects, and (ii) a crossover from negative to positive MR upon cooling down the sample.

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Article information

DOI: https://doi.org/10.1039/C5TC04445F
Article type: Paper
Submitted: 30 Dec 2015
Accepted: 17 Feb 2016
First published: 19 Feb 2016

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J. Mater. Chem. C, 2016,4, 2252-2258

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Graphene enhances the magnetoresistance of FeNi₃ nanoparticles in hierarchical FeNi₃–graphene nanocomposites

G. Abellán, H. Prima-García and E. Coronado, J. Mater. Chem. C, 2016, 4, 2252 DOI: 10.1039/C5TC04445F

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Journal of Materials Chemistry C