Tabby graphene: Dimensional magnetic crossover in fluorinated graphite

Abstract Tabby is a pattern of short irregular stripes, usually related to domestic cats. We have produced Tabby patterns on graphene by attaching fluorine atoms running as monoatomic chains in crystallographic directions. Separated by non-fluorinated sp 2 carbon ribbons, sp 3-hybridized carbon atom...

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Autores principales:	T. L. Makarova, A. L. Shelankov, A. I. Shames, A. A. Zyrianova, A. A. Komlev, G. N. Chekhova, D. V. Pinakov, L. G. Bulusheva, A. V. Okotrub, E. Lähderanta
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/cadeba0a4d514694afd678871e89f0a2
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spelling	oai:doaj.org-article:cadeba0a4d514694afd678871e89f0a22021-12-02T11:53:03ZTabby graphene: Dimensional magnetic crossover in fluorinated graphite10.1038/s41598-017-16321-52045-2322https://doaj.org/article/cadeba0a4d514694afd678871e89f0a22017-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-16321-5https://doaj.org/toc/2045-2322Abstract Tabby is a pattern of short irregular stripes, usually related to domestic cats. We have produced Tabby patterns on graphene by attaching fluorine atoms running as monoatomic chains in crystallographic directions. Separated by non-fluorinated sp 2 carbon ribbons, sp 3-hybridized carbon atoms bonded to zigzag fluorine chains produce sp 2-sp 3 interfaces and spin-polarized edge states localized on both sides of the chains. We have compared two kinds of fluorinated graphite samples C2F x , with x near to 1 and x substantially below 1. The magnetic susceptibility of C2F x (x < 1) shows a broad maximum and a thermally activated spin gap behaviour that can be understood in a two-leg spin ladder model with ferromagnetic legs and antiferromagnetic rungs; the spin gap constitutes about 450 K. Besides, stable room-temperature ferromagnetism is observed in C2F x (x < 1) samples: the crossover to a three-dimensional magnetic behaviour is due to the onset of interlayer interactions. Similarly prepared C2F x (x ≈ 1) samples demonstrate features of two-dimensional magnetism without signs of high-temperature magnetic ordering, but with transition to a superparamagnetic state below 40 K instead. The magnetism of the Tabby graphene is stable until 520 K, which is the temperature of the structural reconstruction of fluorinated graphite.T. L. MakarovaA. L. ShelankovA. I. ShamesA. A. ZyrianovaA. A. KomlevG. N. ChekhovaD. V. PinakovL. G. BulushevaA. V. OkotrubE. LähderantaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q T. L. Makarova A. L. Shelankov A. I. Shames A. A. Zyrianova A. A. Komlev G. N. Chekhova D. V. Pinakov L. G. Bulusheva A. V. Okotrub E. Lähderanta Tabby graphene: Dimensional magnetic crossover in fluorinated graphite
description	Abstract Tabby is a pattern of short irregular stripes, usually related to domestic cats. We have produced Tabby patterns on graphene by attaching fluorine atoms running as monoatomic chains in crystallographic directions. Separated by non-fluorinated sp 2 carbon ribbons, sp 3-hybridized carbon atoms bonded to zigzag fluorine chains produce sp 2-sp 3 interfaces and spin-polarized edge states localized on both sides of the chains. We have compared two kinds of fluorinated graphite samples C2F x , with x near to 1 and x substantially below 1. The magnetic susceptibility of C2F x (x < 1) shows a broad maximum and a thermally activated spin gap behaviour that can be understood in a two-leg spin ladder model with ferromagnetic legs and antiferromagnetic rungs; the spin gap constitutes about 450 K. Besides, stable room-temperature ferromagnetism is observed in C2F x (x < 1) samples: the crossover to a three-dimensional magnetic behaviour is due to the onset of interlayer interactions. Similarly prepared C2F x (x ≈ 1) samples demonstrate features of two-dimensional magnetism without signs of high-temperature magnetic ordering, but with transition to a superparamagnetic state below 40 K instead. The magnetism of the Tabby graphene is stable until 520 K, which is the temperature of the structural reconstruction of fluorinated graphite.
format	article
author	T. L. Makarova A. L. Shelankov A. I. Shames A. A. Zyrianova A. A. Komlev G. N. Chekhova D. V. Pinakov L. G. Bulusheva A. V. Okotrub E. Lähderanta
author_facet	T. L. Makarova A. L. Shelankov A. I. Shames A. A. Zyrianova A. A. Komlev G. N. Chekhova D. V. Pinakov L. G. Bulusheva A. V. Okotrub E. Lähderanta
author_sort	T. L. Makarova
title	Tabby graphene: Dimensional magnetic crossover in fluorinated graphite
title_short	Tabby graphene: Dimensional magnetic crossover in fluorinated graphite
title_full	Tabby graphene: Dimensional magnetic crossover in fluorinated graphite
title_fullStr	Tabby graphene: Dimensional magnetic crossover in fluorinated graphite
title_full_unstemmed	Tabby graphene: Dimensional magnetic crossover in fluorinated graphite
title_sort	tabby graphene: dimensional magnetic crossover in fluorinated graphite
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/cadeba0a4d514694afd678871e89f0a2
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Tabby graphene: Dimensional magnetic crossover in fluorinated graphite

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