Artículos de revistas
Esr Investigation Of Graphite-like Amorphous Carbon Films Revealing Itinerant States As The Ones Responsible For The Signal
Registro en:
Journal Of Non-crystalline Solids. , v. 354, n. 19-25, p. 2135 - 2137, 2008.
223093
10.1016/j.jnoncrysol.2007.10.063
2-s2.0-43049145527
Autor
Viana G.A.
Lacerda R.G.
Freire Jr. F.L.
Marques F.C.
Institución
Resumen
The origin of paramagnetic centers in graphite-like amorphous carbon is investigated. The films were deposited by the ion beam assisted deposition (IBAD) and have a concentration of sp2 sites of about 90% and zero energy band gap. The density of the film and the electrical resistivity are close to these of crystalline graphite. However, the hardness and stress of the films are similar to those of diamond-like carbon. Electron spin resonance (ESR) performed at the X-band (9.4 GHz) revealed an unexpected low density of paramagnetic centers, ascribed to conduction electrons with a g-value of about 2.003. © 2008 Elsevier B.V. All rights reserved. 354 19-25 2135 2137 Robertson, J., (1996) PRB, 53 (24), p. 16302 Barklie, R.C., (2001) Diam. Relat. Mater., 10, p. 174 Lacerda, R.G., Hammer, P., Lepiensky, C.M., Alvarez, F., Marques, F.C., (2001) J. Vac. Sci. Technol. A, 19 (3), p. 971 Poa, C.H., Lacerda, R.G., Cox, D.C., Silva, S.R.P., Marques, F.C., (2002) Appl. Phys. Lett., 81 (5), p. 853 Sercheli, M.S., Kopelevich, Y., Ricardo da Silva, R., Torres, J.H.S., Rettori, C., (2002) Solid State Commun., 121, p. 579 Von Bardeleben, H.J., Cantin, J.L., Zeinert, A., Racine, B., Zellama, K., Hai, P.N., (2001) Appl. Phys. Lett., 78 (19), p. 2843 Hoinkis, M., Tober, E.D., White, R.L., Crowder, M.S., (1992) Appl. Phys. Lett., 61 (22), p. 2653