Transition from giant linear positive to negative magnetoresistance as a result of the metal insulator transition in cobalt nanosheet decorated graphene with high coercivity

Abstract Integration of superior electronic property of graphene and magnetic property of transition metal (TM) to achieve promising materials with excellent electronic and magnetic properties is an interesting area of research. Intrinsically, charge transport in pristine graphene and magnetic property in nanophase TM are well studied subjects. However, these properties deviate drastically from their intrinsic counterpart due to strong interaction at the interface when TM nanostructures are grown on graphene surface. So far no serious effort has been given to look at this issue. Therefore, in the present work, graphene sheet is decorated by Co nanosheets of average lateral dimension of ~15 nm to explore the basic understanding of charge transport, magnetism and magnetoresistance in these integrated structures. Very interesting metal–insulator transition is observed. The charge transport is explained by electron–electron interaction in the insulating regime as arising due to quantum interference and electron scattering in the metallic regime. The materials also show a high coercivity and a transition from giant linear positive magnetoresistance to nonlinear negative magnetoresistance. High coercivity in the present sample arises due to charge transfer, surface pinning and strain created at the graphene/Co interface while positive and negative magnetoresistances are explained on the basis of electron–electron interaction and electron-spin scattering respectively.

• Publication year

  2020

• Venue

  Journal of Magnetism and Magnetic Materials

• Publication date

  2020-07-15

• Fields of study

  Materials Science, Physics

• Identifiers
  DOI 10.1016/j.jmmm.2020.166601
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

• Charge transfer induced ferromagnetism and anomalous temperature increment of coercivity in ultrathin α-Fe2O3 decorated graphene 2D nanostructures

  2019cited by this paper
• Anomalous large negative magnetoresistance in transition-metal decorated graphene: Evidence for electron-hole puddles

  2019cited by this paper
• Induced ferromagnetism and metal-insulator transition due to a charge transfer effect in silver nanoparticle decorated MoS2

  2018cited by this paper
• Antiferro-ferromagnetic transition in ultrathin Ni(OH)2 layer grown on graphene surface and observation of interlayer exchange coupling in Ni(OH)2/graphene/Ni(OH)2 nanostructures

  2017cited by this paper
• Realization of two-dimensional ferromagnetism with giant coercivity in ultrathin β − Ni ( OH ) 2 layers grown on a Mo S 2 surface

  2016cited by this paper
• Charge transport in HoxLu1-xB12: Separating Positive and Negative Magnetoresistance in Metals with Magnetic Ions

  2014cited by this paper
• Dielectric properties of cobalt ferrite nanoparticles in ultrathin nanocomposite films.

  2013cited by this paper
• Induced spin–orbit splitting in graphene: the role of atomic number of the intercalated metal and π–d hybridization

  2013cited by this paper
• Unexpected magnetism in nanomaterials

  2013cited by this paper
• Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets of varying carbonsp2fraction

  2012cited by this paper
• Magnetic phase diagram of MnSi in the high-field region

  2012cited by this paper
• Probing the Thermal Deoxygenation of Graphene Oxide Using High-Resolution In Situ X-ray-Based Spectroscopies

  2011cited by this paper
• Effective mass of electrons and holes in bilayer graphene: Electron-hole asymmetry and electron-electron interaction

  2011cited by this paper
• Electronic and magnetic properties of the graphene–ferromagnet interface

  2010cited by this paper
• Reduction of graphene oxide via L-ascorbic acid.

  2010cited by this paper
• Coulomb blockade and hopping conduction in graphene quantum dots array

  2010cited by this paper
• Space charge limited conduction with exponential trap distribution in reduced graphene oxide sheets

  2010cited by this paper
• Anomalous temperature dependence of the electrical resistivity in In0.17Ga0.83N

  2009cited by this paper
• Induced magnetism of carbon atoms at the graphene/Ni(111) interface

  2009cited by this paper
• Rashba effect in the graphene/ni(111) system.

  2007cited by this paper
• Charge transfer effect in the polyaniline-gold nanoparticle memory system

  2007cited by this paper
• Cobalt cluster-assembled thin films deposited by low energy cluster beam deposition : structural and magnetic investigations of deposited layers

  2006cited by this paper
• Electrical properties of transparent and conducting Ga doped ZnO

  2006cited by this paper
• Array of cobalt nanoparticles in silica: Synthesis and effects of thermal annealing

  2006cited by this paper
• Evidence of gap state formed by the charge transfer in Alq3∕NaCl∕Al interface studied by ultraviolet and x-ray photoelectron spectroscopy

  2005cited by this paper
• Growth and magnetism of metallic thin films and multilayers by pulsed-laser deposition

  2004cited by this paper
• X-ray studies of the structure and electronic behavior of alkanethiolate-capped gold nanoparticles: the interplay of size and surface effects.

  2003cited by this paper
• Surface effects on the magnetic properties of ultrafine cobalt particles

  1998cited by this paper
• Insulator-metal transition and giant magnetoresistance in La1-xSrxMnO3.

  1995cited by this paper
• Magneto‐optical studies of Co/Au ultrathin metallic films

  1990cited by this paper
• Curie temperature of ultrathin films of fcc-cobalt epitaxially grown on atomically flat Cu(100) surfaces.

  1990cited by this paper
• Conduction in non-crystalline materials

  1989cited by this paper
• Handbook of conducting polymers

  1986cited by this paper
• Disordered Electronic Systems

  1985cited by this paper
• Magnetoresistance of weakly disordered electrons

  1982cited by this paper
• Stress dependence of the magnetic permeability of MnZn ferrous ferrites

  1980cited by this paper
• Metal-insulator transitions

  1980cited by this paper
• A profile refinement method for nuclear and magnetic structures

  1969cited by this paper
• Mobility of Charge Carriers in Semiconducting Layer Structures

  1967cited by this paper
• Resistance Minimum in Dilute Magnetic Alloys

  1964cited by this paper
• Fermi Surface of Ferromagnetic Nickel

  1964cited by this paper
• Electron-Electron Scattering and Transport Phenomena in Nonpolar Semiconductors

  1961cited by this paper
• Preparation of Graphitic Oxide

  1958cited by this paper
• Anomalous Electrical Resistivity and Magnetoresistance Due to an s − d Interaction in Cu-Mn Alloys

  1957cited by this paper

• Magnetotransport and rich <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e568" altimg="si84.svg"> <mml:mi>H</mml:mi> </mml:math> - <mml:math xmlns:mml="http://www.w3

  2026cites this paper
• Electron-magnon coupling mediated magnetotransport in antiferromagnetic van der Waals heterostructures

  2024cites this paper
• Charge transfer mediated coercivity enhancement in Cu_0.26Ni_0.74 alloy nanoparticles on blending them with carbon nanotubes

  2023cites this paper
• Correlation between Slanted Magnetic Structure and Electromagnetic Responses in the RAlGe (R = Tb and Er) System

  2021cites this paper