Strong paramagnetism and possible ferromagnetism in pure carbon nanofoam produced by laser ablation

A. V. Rode; E. G. Gamaly; A. G. Christy; J. Fitz Gerald; S. T. Hyde; R. G. Elliman; B. Luther-Davies; A. I. Veinger; J. Androulakis; J. Giapintzakis

doi:10.1016/j.jmmm.2004.11.213

Strong paramagnetism and possible ferromagnetism in pure carbon nanofoam produced by laser ablation

A. V. Rode^*, E. G. Gamaly, A. G. Christy, J. Fitz Gerald, S. T. Hyde, R. G. Elliman, B. Luther-Davies, A. I. Veinger, J. Androulakis, J. Giapintzakis

^*Corresponding author for this work

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

17 Citations (Scopus)

Abstract

We report the production of a hierarchically nanostructured magnetic carbon foam by high-repetition-rate laser ablation of glassy carbon in Ar. The clusters contain both sp² and sp³ bonded carbon atoms. The material contains graphite-like sheets with hyperbolic curvature, as proposed for "schwarzite". In addition to other unusual properties, the all-carbon nanofoam exhibits para- and maybe ferromagnetic behavior up to 90 K, with a narrow hysteresis curve, susceptibility of the order of 10^-5 emu/g Oe, and a high saturation magnetization (up to 0.8 emu/g at 1.8 K). We postulate that localized unpaired spins occur because of topological and bonding defects associated with the sheet curvature, and that these spins are stabilized for >1 year due to the steric protection offered by the convoluted sheets.

Original language	English
Pages (from-to)	298-301
Number of pages	4
Journal	Journal of Magnetism and Magnetic Materials
Volume	290-291 PART 1
DOIs	https://doi.org/10.1016/j.jmmm.2004.11.213
Publication status	Published - Apr 2005

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Rode, A. V., Gamaly, E. G., Christy, A. G., Fitz Gerald, J., Hyde, S. T., Elliman, R. G., Luther-Davies, B., Veinger, A. I., Androulakis, J., & Giapintzakis, J. (2005). Strong paramagnetism and possible ferromagnetism in pure carbon nanofoam produced by laser ablation. Journal of Magnetism and Magnetic Materials, 290-291 PART 1, 298-301. https://doi.org/10.1016/j.jmmm.2004.11.213

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title = "Strong paramagnetism and possible ferromagnetism in pure carbon nanofoam produced by laser ablation",

abstract = "We report the production of a hierarchically nanostructured magnetic carbon foam by high-repetition-rate laser ablation of glassy carbon in Ar. The clusters contain both sp2 and sp3 bonded carbon atoms. The material contains graphite-like sheets with hyperbolic curvature, as proposed for {"}schwarzite{"}. In addition to other unusual properties, the all-carbon nanofoam exhibits para- and maybe ferromagnetic behavior up to 90 K, with a narrow hysteresis curve, susceptibility of the order of 10-5 emu/g Oe, and a high saturation magnetization (up to 0.8 emu/g at 1.8 K). We postulate that localized unpaired spins occur because of topological and bonding defects associated with the sheet curvature, and that these spins are stabilized for >1 year due to the steric protection offered by the convoluted sheets.",

keywords = "Carbon nanoclusters, Magnetism in carbon structures",

author = "Rode, \{A. V.\} and Gamaly, \{E. G.\} and Christy, \{A. G.\} and \{Fitz Gerald\}, J. and Hyde, \{S. T.\} and Elliman, \{R. G.\} and B. Luther-Davies and Veinger, \{A. I.\} and J. Androulakis and J. Giapintzakis",

year = "2005",

month = apr,

doi = "10.1016/j.jmmm.2004.11.213",

language = "English",

volume = "290-291 PART 1",

pages = "298--301",

journal = "Journal of Magnetism and Magnetic Materials",

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TY - JOUR

T1 - Strong paramagnetism and possible ferromagnetism in pure carbon nanofoam produced by laser ablation

AU - Rode, A. V.

AU - Gamaly, E. G.

AU - Christy, A. G.

AU - Fitz Gerald, J.

AU - Hyde, S. T.

AU - Elliman, R. G.

AU - Luther-Davies, B.

AU - Veinger, A. I.

AU - Androulakis, J.

AU - Giapintzakis, J.

PY - 2005/4

Y1 - 2005/4

N2 - We report the production of a hierarchically nanostructured magnetic carbon foam by high-repetition-rate laser ablation of glassy carbon in Ar. The clusters contain both sp2 and sp3 bonded carbon atoms. The material contains graphite-like sheets with hyperbolic curvature, as proposed for "schwarzite". In addition to other unusual properties, the all-carbon nanofoam exhibits para- and maybe ferromagnetic behavior up to 90 K, with a narrow hysteresis curve, susceptibility of the order of 10-5 emu/g Oe, and a high saturation magnetization (up to 0.8 emu/g at 1.8 K). We postulate that localized unpaired spins occur because of topological and bonding defects associated with the sheet curvature, and that these spins are stabilized for >1 year due to the steric protection offered by the convoluted sheets.

AB - We report the production of a hierarchically nanostructured magnetic carbon foam by high-repetition-rate laser ablation of glassy carbon in Ar. The clusters contain both sp2 and sp3 bonded carbon atoms. The material contains graphite-like sheets with hyperbolic curvature, as proposed for "schwarzite". In addition to other unusual properties, the all-carbon nanofoam exhibits para- and maybe ferromagnetic behavior up to 90 K, with a narrow hysteresis curve, susceptibility of the order of 10-5 emu/g Oe, and a high saturation magnetization (up to 0.8 emu/g at 1.8 K). We postulate that localized unpaired spins occur because of topological and bonding defects associated with the sheet curvature, and that these spins are stabilized for >1 year due to the steric protection offered by the convoluted sheets.

KW - Carbon nanoclusters

KW - Magnetism in carbon structures

UR - https://www.scopus.com/pages/publications/20144363201

U2 - 10.1016/j.jmmm.2004.11.213

DO - 10.1016/j.jmmm.2004.11.213

M3 - Article

SN - 0304-8853

VL - 290-291 PART 1

SP - 298

EP - 301

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -

Strong paramagnetism and possible ferromagnetism in pure carbon nanofoam produced by laser ablation

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