2013/02/14 by K. Bagani, A. Bhattacharya, J. Kaur +4
Materials Science · Physics and Astronomy · #Antiferromagnetism #Coercivity #Ferromagnetism #Graphene #Graphene research and applications #Magnetism in coordination complexes #Oxide #Paramagnetism #Supercapacitor Materials and Fabrication #Weak localization #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.4861173
6 figures
arxiv created 2013/02/14 · openalex publication_date 2014/01/09 · arxiv updated 2015/06/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In this report, we present the temperature dependence of the magnetic coercivity of graphene oxide (GO) and reduced graphene oxide (RGO). We observe an anomalous decrease in coercivity of GO and RGO with decreasing temperature. The observation could be understood by invoking the inherent presence of wrinkles on graphene oxide due to presence of oxygen containing groups. Scanning electron microscopic image reveals high wrinkles in GO than RGO. We observe higher coercivity in RGO than in GO. At room temperature, we observe antiferromagnetic and ferromagnetic behaviours in GO and RGO, respectively. Whereas, at low temperatures (below T = 60–70 K), both materials show paramagnetic behaviour.