Wafer-Scale Hyper-Porous Graphene Network With Intrinsic Ferromagnetism at Room-Temperature

Chao Wang; Nan Jian; Meijie Yin; Xi Zhang; Takashi Kikkawa; Shunsuke Daimon; Eiji Saitoh; Qian Li; Wensheng Yan; Dazhi Hou; Lei Yang; Chunbo Li; Duo Zhao; Dongfeng Diao

doi:10.1002/adma.74568

Wafer-Scale Hyper-Porous Graphene Network With Intrinsic Ferromagnetism at Room-Temperature

Chao Wang
, Nan Jian
, Meijie Yin
, Xi Zhang
, Takashi Kikkawa
, Shunsuke Daimon
, Eiji Saitoh
, Qian Li
, Wensheng Yan
, Dazhi Hou
, Lei Yang
, Chunbo Li
, Duo Zhao
, Dongfeng Diao

School of Mechanical Engineering

Institute of Nanosurface Science and Engineering
Shenzhen University
Advanced Science Research Center
Japan Atomic Energy Agency
Quantum Materials and Applications Research Center
National Institutes for Quantum Science and Technology
Department of Applied Physics & Institute for AI and Beyond
UTokyo
Tohoku University
RIKEN
and School of Nuclear Science and Technology
National Synchrotron Radiation Laboratory
University of Science and Technology of China
Shenzhen Technology University
Department of Applied Physics
Hong Kong Polytechnic University

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

Abstract

We report a wafer-scale hyper-porous graphene network (HGN) with room-temperature intrinsic magnetism, which was revealed by both XMCD spectra at C K-edge and M-H curve, corresponding to a magnetic moment density of ∼0.06 μ_B/atom, 1000 times higher than in defected HOPG. The impurity effects on magnetism were excluded by XMCD and ICP-MS measurements. Atomic-resolution observations unveiled that the magnetism originate from dangling zigzag edges within HGN pores apart over 1.4 nm, which was proved by annealing treatment and DFT calculations. This work confirms that intrinsic carbon ferromagnetism with the same physical mechanism as in the microscale can be obtained in bulk carbon systems. It provides a novel platform to further explore the spintronic and magnetic applications of carbon allotropes.

Original language	English
Journal	Advanced Materials
DOIs	https://doi.org/10.1002/adma.74568
State	Accepted/In press - 2026

Keywords

dangling bond
ferromagnetism
graphene edge
hyperporous carbon
magnetic moment
spintronics
X-ray Magnetic Circular Dichroism

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10.1002/adma.74568

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@article{71bb6263bdbb49b1a4455c4e4192448c,

title = "Wafer-Scale Hyper-Porous Graphene Network With Intrinsic Ferromagnetism at Room-Temperature",

abstract = "We report a wafer-scale hyper-porous graphene network (HGN) with room-temperature intrinsic magnetism, which was revealed by both XMCD spectra at C K-edge and M-H curve, corresponding to a magnetic moment density of ∼0.06 μB/atom, 1000 times higher than in defected HOPG. The impurity effects on magnetism were excluded by XMCD and ICP-MS measurements. Atomic-resolution observations unveiled that the magnetism originate from dangling zigzag edges within HGN pores apart over 1.4 nm, which was proved by annealing treatment and DFT calculations. This work confirms that intrinsic carbon ferromagnetism with the same physical mechanism as in the microscale can be obtained in bulk carbon systems. It provides a novel platform to further explore the spintronic and magnetic applications of carbon allotropes.",

keywords = "dangling bond, ferromagnetism, graphene edge, hyperporous carbon, magnetic moment, spintronics, X-ray Magnetic Circular Dichroism",

author = "Chao Wang and Nan Jian and Meijie Yin and Xi Zhang and Takashi Kikkawa and Shunsuke Daimon and Eiji Saitoh and Qian Li and Wensheng Yan and Dazhi Hou and Lei Yang and Chunbo Li and Duo Zhao and Dongfeng Diao",

note = "Publisher Copyright: {\textcopyright} 2026 Wiley-VCH GmbH.",

year = "2026",

doi = "10.1002/adma.74568",

language = "英语",

journal = "Advanced Materials",

issn = "0935-9648",

publisher = "John Wiley and Sons Inc",

}

TY - JOUR

T1 - Wafer-Scale Hyper-Porous Graphene Network With Intrinsic Ferromagnetism at Room-Temperature

AU - Wang, Chao

AU - Jian, Nan

AU - Yin, Meijie

AU - Zhang, Xi

AU - Kikkawa, Takashi

AU - Daimon, Shunsuke

AU - Saitoh, Eiji

AU - Li, Qian

AU - Yan, Wensheng

AU - Hou, Dazhi

AU - Yang, Lei

AU - Li, Chunbo

AU - Zhao, Duo

AU - Diao, Dongfeng

PY - 2026

Y1 - 2026

N2 - We report a wafer-scale hyper-porous graphene network (HGN) with room-temperature intrinsic magnetism, which was revealed by both XMCD spectra at C K-edge and M-H curve, corresponding to a magnetic moment density of ∼0.06 μB/atom, 1000 times higher than in defected HOPG. The impurity effects on magnetism were excluded by XMCD and ICP-MS measurements. Atomic-resolution observations unveiled that the magnetism originate from dangling zigzag edges within HGN pores apart over 1.4 nm, which was proved by annealing treatment and DFT calculations. This work confirms that intrinsic carbon ferromagnetism with the same physical mechanism as in the microscale can be obtained in bulk carbon systems. It provides a novel platform to further explore the spintronic and magnetic applications of carbon allotropes.

AB - We report a wafer-scale hyper-porous graphene network (HGN) with room-temperature intrinsic magnetism, which was revealed by both XMCD spectra at C K-edge and M-H curve, corresponding to a magnetic moment density of ∼0.06 μB/atom, 1000 times higher than in defected HOPG. The impurity effects on magnetism were excluded by XMCD and ICP-MS measurements. Atomic-resolution observations unveiled that the magnetism originate from dangling zigzag edges within HGN pores apart over 1.4 nm, which was proved by annealing treatment and DFT calculations. This work confirms that intrinsic carbon ferromagnetism with the same physical mechanism as in the microscale can be obtained in bulk carbon systems. It provides a novel platform to further explore the spintronic and magnetic applications of carbon allotropes.

KW - dangling bond

KW - ferromagnetism

KW - graphene edge

KW - hyperporous carbon

KW - magnetic moment

KW - spintronics

KW - X-ray Magnetic Circular Dichroism

UR - https://www.scopus.com/pages/publications/105048725058

U2 - 10.1002/adma.74568

DO - 10.1002/adma.74568

M3 - 文章

AN - SCOPUS:105048725058

SN - 0935-9648

JO - Advanced Materials

JF - Advanced Materials

ER -

Wafer-Scale Hyper-Porous Graphene Network With Intrinsic Ferromagnetism at Room-Temperature

Abstract

Keywords

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