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

doi:10.1016/j.matlet.2021.129730

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 journal › Article › peer-review

1 Citation (Scopus)

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 language	English
Article number	129730
Journal	Materials Letters
Volume	293
DOIs	https://doi.org/10.1016/j.matlet.2021.129730
Publication status	Published - 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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10.1016/j.matlet.2021.129730

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title = "Enhanced room-temperature positive magnetoresistance of graphene by decorating Co particles on the surface",

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.",

keywords = "Graphene/ferromagnet, Hybridization, Linear magnetoresistance, Weak localization",

author = "Qianwen Wang and Tenghua Gao and Takashi Harumoto and Kazuya Ando and Yoshio Nakamura and Ji Shi",

note = "Funding Information: J. S. and K. A. are grateful for the support by JSPS KAKENHI Grant Number 19H00864 . The authors would like to acknowledge the support from Materials Analysis Division, Tokyo Institute of Technology. Q. W. acknowledge financial support from Ministry of Education, Culture, Sports, Science and Technology ( MEXT ), Japan. Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

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doi = "10.1016/j.matlet.2021.129730",

language = "English",

volume = "293",

journal = "Materials Letters",

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TY - JOUR

T1 - Enhanced room-temperature positive magnetoresistance of graphene by decorating Co particles on the surface

AU - Wang, Qianwen

AU - Gao, Tenghua

AU - Harumoto, Takashi

AU - Ando, Kazuya

AU - Nakamura, Yoshio

AU - Shi, Ji

N1 - Funding Information: J. S. and K. A. are grateful for the support by JSPS KAKENHI Grant Number 19H00864 . The authors would like to acknowledge the support from Materials Analysis Division, Tokyo Institute of Technology. Q. W. acknowledge financial support from Ministry of Education, Culture, Sports, Science and Technology ( MEXT ), Japan. Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/6/15

Y1 - 2021/6/15

N2 - 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.

AB - 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.

KW - Graphene/ferromagnet

KW - Hybridization

KW - Linear magnetoresistance

KW - Weak localization

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DO - 10.1016/j.matlet.2021.129730

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SN - 0167-577X

VL - 293

JO - Materials Letters

JF - Materials Letters

M1 - 129730

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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