Low Band Gap Co80Ni20@RGO Nanocomposite

Debajyoti De; Subham Majumdar; Saurav Giri

doi:10.4028/www.scientific.net/AMR.856.299

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 856Low Band Gap Co80Ni20@RGO Nanocomposite

Low Band Gap Co₈₀Ni₂₀@RGO Nanocomposite

Abstract:

We report a novel approach of designing ordered arrangement of disorder on the extended structures of graphene. We prepared single phase nanoparticles of Co₈₀Ni₂₀ alloy embedded in Reduced Graphene Oxide (RGO). Co₈₀Ni₂₀shows a large moment and a soft ferromagnetic character like permalloy at room temperature. Temperature dependence of permittivity shows a behavior quite contrary to usual ceramic materials showing an increase with decreasing temperature, exhibiting a maximum. A very large magnitude of permittivity ~ 5000 is observed, which is possibly related to an interesting Maxwell-Wagner type effect arising from the charge localization in the graphene sheets. For a deeper insight of the mechanism, correlations with other phenomena are studied through magnetization, dc resistivity, I-V etc. investigations. Temperature dependent magnetization indicates toward strong ferromagnetic interaction and MH loop shows low coercivity ferromagnetic interaction at 4 K and even at room temperature.

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Periodical:

Advanced Materials Research (Volume 856)

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299-303

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https://doi.org/10.4028/www.scientific.net/AMR.856.299

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Online since:

December 2013

Authors:

Debajyoti De, Subham Majumdar, Saurav Giri

Keywords:

Co₈₀Ni₂₀, Graphene, Nano Alloy, rGO

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