Anomalous magnetic behavior in nanocomposite materials of reduced graphene oxide-Ni/NiFe2O4

Pratap Kollu; Sateesh Prathapani; Eswara K. Varaprasadarao; Chella Santosh; Sudhanshu Mallick; Andrews Nirmala Grace; D. Bahadur

doi:10.1063/1.4892476

Anomalous magnetic behavior in nanocomposite materials of reduced graphene oxide-Ni/NiFe₂O₄

Pratap Kollu^*, Sateesh Prathapani, Eswara K. Varaprasadarao, Chella Santosh, Sudhanshu Mallick, Andrews Nirmala Grace, D. Bahadur

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Magnetic Reduced Graphene Oxide-Nickel/NiFe₂O₄ (RGO-Ni/NF) nanocomposite has been synthesized by one pot solvothermal method. Respective phase formations and their purities in the composite are confirmed by High Resolution Transmission Electron Microscope and X Ray Diffraction, respectively. For the RGO-Ni/NF composite material finite-size effects lead to the anomalous magnetic behavior, which is corroborated in temperature and field dependent magnetization curves. Here, we are reporting the behavior of higher magnetization values for Zero Field Cooled condition to that of Field Cooled for the RGO-Ni/NF nanocomposite. Also, the observed negative and positive moments in Hysteresis loops at relatively smaller applied fields (100Oe and 200Oe) are explained on the basis of surface spin disorder.

Original language	English
Article number	052412
Journal	Applied Physics Letters
Volume	105
Issue number	5
DOIs	https://doi.org/10.1063/1.4892476
State	Published - 4 Aug 2014
Externally published	Yes

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title = "Anomalous magnetic behavior in nanocomposite materials of reduced graphene oxide-Ni/NiFe2O4",

abstract = "Magnetic Reduced Graphene Oxide-Nickel/NiFe2O4 (RGO-Ni/NF) nanocomposite has been synthesized by one pot solvothermal method. Respective phase formations and their purities in the composite are confirmed by High Resolution Transmission Electron Microscope and X Ray Diffraction, respectively. For the RGO-Ni/NF composite material finite-size effects lead to the anomalous magnetic behavior, which is corroborated in temperature and field dependent magnetization curves. Here, we are reporting the behavior of higher magnetization values for Zero Field Cooled condition to that of Field Cooled for the RGO-Ni/NF nanocomposite. Also, the observed negative and positive moments in Hysteresis loops at relatively smaller applied fields (100Oe and 200Oe) are explained on the basis of surface spin disorder.",

author = "Pratap Kollu and Sateesh Prathapani and Varaprasadarao, {Eswara K.} and Chella Santosh and Sudhanshu Mallick and Grace, {Andrews Nirmala} and D. Bahadur",

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T1 - Anomalous magnetic behavior in nanocomposite materials of reduced graphene oxide-Ni/NiFe2O4

AU - Kollu, Pratap

AU - Prathapani, Sateesh

AU - Varaprasadarao, Eswara K.

AU - Santosh, Chella

AU - Mallick, Sudhanshu

AU - Grace, Andrews Nirmala

AU - Bahadur, D.

PY - 2014/8/4

Y1 - 2014/8/4

N2 - Magnetic Reduced Graphene Oxide-Nickel/NiFe2O4 (RGO-Ni/NF) nanocomposite has been synthesized by one pot solvothermal method. Respective phase formations and their purities in the composite are confirmed by High Resolution Transmission Electron Microscope and X Ray Diffraction, respectively. For the RGO-Ni/NF composite material finite-size effects lead to the anomalous magnetic behavior, which is corroborated in temperature and field dependent magnetization curves. Here, we are reporting the behavior of higher magnetization values for Zero Field Cooled condition to that of Field Cooled for the RGO-Ni/NF nanocomposite. Also, the observed negative and positive moments in Hysteresis loops at relatively smaller applied fields (100Oe and 200Oe) are explained on the basis of surface spin disorder.

AB - Magnetic Reduced Graphene Oxide-Nickel/NiFe2O4 (RGO-Ni/NF) nanocomposite has been synthesized by one pot solvothermal method. Respective phase formations and their purities in the composite are confirmed by High Resolution Transmission Electron Microscope and X Ray Diffraction, respectively. For the RGO-Ni/NF composite material finite-size effects lead to the anomalous magnetic behavior, which is corroborated in temperature and field dependent magnetization curves. Here, we are reporting the behavior of higher magnetization values for Zero Field Cooled condition to that of Field Cooled for the RGO-Ni/NF nanocomposite. Also, the observed negative and positive moments in Hysteresis loops at relatively smaller applied fields (100Oe and 200Oe) are explained on the basis of surface spin disorder.

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Anomalous magnetic behavior in nanocomposite materials of reduced graphene oxide-Ni/NiFe₂O₄

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