Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/74056
Type: Artigo de periódico
Title: Synthesis and characterization of stable room temperature bulk ferromagnetic graphite
Author: Pardo, H
Faccio, R
Araujo-Moreira, FM
de Lima, OF
Mombru, AW
Abstract: A novel and inexpensive chemical route leading to obtain macroscopic quantities of room temperature magnetic carbon is reported. This route consists of a controlled etching on the graphite structure, performed by a redox reaction in a closed system between graphite and CuO. X-ray diffraction suggests that this modified graphite could be represented by the coexistence of a matrix of pristine graphite and a foamy-like graphitic structure compressed along the c-axis. This material has a stable and strong ferromagnetic response even at room temperature where it can be attracted by any commercial magnet. At T=300 K, the saturation magnetic moment, the coercive field and the remnant magnetization are 0.25 emu/g, 350 Oe and 0.04 emu/g, respectively. (C) 2005 Elsevier Ltd. All rights reserved.
Subject: graphite
chemical treatment
magnetic properties
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Rights: fechado
Identifier DOI: 10.1016/j.carbon.2005.07.041
Date Issue: 2006
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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