Enhanced room-temperature positive magnetoresistance of graphene by decorating Co particles on the surface

Qianwen Wang, Tenghua Gao, Takashi Harumoto, Kazuya Ando, Yoshio Nakamura, Ji Shi

Research output: Contribution to journalArticlepeer-review

Abstract

Magneto-transport properties of graphene and graphene/Co have been investigated. Enhanced linear positive magnetoresistance (PMR) of graphene is obtained at room temperature by depositing Co particles on the surface, which introduces strong inhomogeneity. Graphene is still in weakly disordered regime after Co deposition as proved by weak localization effect and Raman spectra. And interfacial hybridization between graphene and Co further enhances spatial fluctuation of carrier density and mobility, inducing a higher PMR which is useful for magnetic sensing at room temperature.

Original languageEnglish
Article number129730
JournalMaterials Letters
Volume293
DOIs
Publication statusPublished - 2021 Jun 15

Keywords

  • Graphene/ferromagnet
  • Hybridization
  • Linear magnetoresistance
  • Weak localization

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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