Cargando…

Towards intrinsic magnetism of graphene sheets with irregular zigzag edges

The magnetism of graphene has remained divergent and controversial due to absence of reliable experimental results. Here we show the intrinsic magnetism of graphene edge states revealed based on unidirectional aligned graphene sheets derived from completely carbonized SiC crystals. It is found that...

Descripción completa

Detalles Bibliográficos
Autores principales: Chen, Lianlian, Guo, Liwei, Li, Zhilin, Zhang, Han, Lin, Jingjing, Huang, Jiao, Jin, Shifeng, Chen, Xiaolong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3764447/
https://www.ncbi.nlm.nih.gov/pubmed/24008993
http://dx.doi.org/10.1038/srep02599
_version_ 1782283154609930240
author Chen, Lianlian
Guo, Liwei
Li, Zhilin
Zhang, Han
Lin, Jingjing
Huang, Jiao
Jin, Shifeng
Chen, Xiaolong
author_facet Chen, Lianlian
Guo, Liwei
Li, Zhilin
Zhang, Han
Lin, Jingjing
Huang, Jiao
Jin, Shifeng
Chen, Xiaolong
author_sort Chen, Lianlian
collection PubMed
description The magnetism of graphene has remained divergent and controversial due to absence of reliable experimental results. Here we show the intrinsic magnetism of graphene edge states revealed based on unidirectional aligned graphene sheets derived from completely carbonized SiC crystals. It is found that ferromagnetism, antiferromagnetism and diamagnetism along with a probable superconductivity exist in the graphene with irregular zigzag edges. A phase diagram is constructed to show the evolution of the magnetism. The ferromagnetic ordering curie-temperature of the fundamental magnetic order unit (FMOU) is 820 ± 80 K. The antiferromagnetic ordering Neel temperature of the FMOUs belonging to different sublattices is about 54 ± 2 K. The diamagnetism is similar to that of graphite and can be well described by the Kotosonov's equation. Our experimental results provide new evidences to clarify the controversial experimental phenomena observed in graphene and contribute to a deeper insight into the nature of magnetism in graphene based system.
format Online
Article
Text
id pubmed-3764447
institution National Center for Biotechnology Information
language English
publishDate 2013
publisher Nature Publishing Group
record_format MEDLINE/PubMed
spelling pubmed-37644472013-09-09 Towards intrinsic magnetism of graphene sheets with irregular zigzag edges Chen, Lianlian Guo, Liwei Li, Zhilin Zhang, Han Lin, Jingjing Huang, Jiao Jin, Shifeng Chen, Xiaolong Sci Rep Article The magnetism of graphene has remained divergent and controversial due to absence of reliable experimental results. Here we show the intrinsic magnetism of graphene edge states revealed based on unidirectional aligned graphene sheets derived from completely carbonized SiC crystals. It is found that ferromagnetism, antiferromagnetism and diamagnetism along with a probable superconductivity exist in the graphene with irregular zigzag edges. A phase diagram is constructed to show the evolution of the magnetism. The ferromagnetic ordering curie-temperature of the fundamental magnetic order unit (FMOU) is 820 ± 80 K. The antiferromagnetic ordering Neel temperature of the FMOUs belonging to different sublattices is about 54 ± 2 K. The diamagnetism is similar to that of graphite and can be well described by the Kotosonov's equation. Our experimental results provide new evidences to clarify the controversial experimental phenomena observed in graphene and contribute to a deeper insight into the nature of magnetism in graphene based system. Nature Publishing Group 2013-09-06 /pmc/articles/PMC3764447/ /pubmed/24008993 http://dx.doi.org/10.1038/srep02599 Text en Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/
spellingShingle Article
Chen, Lianlian
Guo, Liwei
Li, Zhilin
Zhang, Han
Lin, Jingjing
Huang, Jiao
Jin, Shifeng
Chen, Xiaolong
Towards intrinsic magnetism of graphene sheets with irregular zigzag edges
title Towards intrinsic magnetism of graphene sheets with irregular zigzag edges
title_full Towards intrinsic magnetism of graphene sheets with irregular zigzag edges
title_fullStr Towards intrinsic magnetism of graphene sheets with irregular zigzag edges
title_full_unstemmed Towards intrinsic magnetism of graphene sheets with irregular zigzag edges
title_short Towards intrinsic magnetism of graphene sheets with irregular zigzag edges
title_sort towards intrinsic magnetism of graphene sheets with irregular zigzag edges
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3764447/
https://www.ncbi.nlm.nih.gov/pubmed/24008993
http://dx.doi.org/10.1038/srep02599
work_keys_str_mv AT chenlianlian towardsintrinsicmagnetismofgraphenesheetswithirregularzigzagedges
AT guoliwei towardsintrinsicmagnetismofgraphenesheetswithirregularzigzagedges
AT lizhilin towardsintrinsicmagnetismofgraphenesheetswithirregularzigzagedges
AT zhanghan towardsintrinsicmagnetismofgraphenesheetswithirregularzigzagedges
AT linjingjing towardsintrinsicmagnetismofgraphenesheetswithirregularzigzagedges
AT huangjiao towardsintrinsicmagnetismofgraphenesheetswithirregularzigzagedges
AT jinshifeng towardsintrinsicmagnetismofgraphenesheetswithirregularzigzagedges
AT chenxiaolong towardsintrinsicmagnetismofgraphenesheetswithirregularzigzagedges