Artículos de revistas
Synthesis and characterization of stable room temperature bulk ferromagnetic graphite
Registro en:
Carbon. Pergamon-elsevier Science Ltd, v. 44, n. 3, n. 565, n. 569, 2006.
0008-6223
WOS:000234186700024
10.1016/j.carbon.2005.07.041
Autor
Pardo, H
Faccio, R
Araujo-Moreira, FM
de Lima, OF
Mombru, AW
Institución
Resumen
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. 44 3 565 569