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Enhanced magnetic properties of cobalt-doped graphene nanoribbons

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Abstract

We have studied structural and magnetic properties of reduced graphene nanoribbons (GNRs) and cobalt (Co)-doped GNRs. The effect of Co was also investigated on the magnetic properties of pristine GNRs, which play vital role in contribution of calculated magnetic moment. Herein, we have synthesized the pristine GNRs and Co-doped GNRs via a simple chemical refluxing process. The analysis of synthesised materials were carried out using different techniques such as Field emission scanning electron microscopy (FESEM) with EDAX analysis and X-ray diffraction pattern were confirmed the doping of Co into the GNRs. Moreover, from morphological analysis (FESEM), impurity or dopant (Co) shows as adsorbed at the surface of GNRs. Raman analysis has proved that the incorporation of Co into graphitic structure creates more defective sites. The results obtained from VSM analysis is clearly revealed that enhanced saturation magnetization (Ms) from ~13.08 × 10−2 emu/g to ~37.35 × 10−2 emu/g, due to the presence of unbalanced electron spins in Co which may be responsible for higher saturation magnetization in case of Co-doped GNRs as comparison of pristine GNRs. The obtained interesting magnetic properties of Co-doped GNRs create much attention towards various applications including spintronics devices and some related fields.

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Acknowledgements

The authors are greatly thankful to Indian Institute of Technology (IIT), Roorkee, India, for providing the research facilities and University Grants Commission of India (UGC India) for funding the research.

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Authors and Affiliations

  1. Centre of Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, India

    Navjot Kaur & Kaushik Pal

  2. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India

    Kaushik Pal

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  1. Navjot Kaur
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Kaur, N., Pal, K. Enhanced magnetic properties of cobalt-doped graphene nanoribbons. Appl. Phys. A 123, 259 (2017). https://doi.org/10.1007/s00339-017-0893-6

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