Abstract
Properties of nanoporous carbon (NPC) free of metal atoms and NPC containing atoms of Ni, Co and Pd in their pores are studied by electron spin resonance (ESR). The asymmetrical ESR line with the so-called Dyson line shape points out that charge carriers are responsible for the resonance spectrum in metal-free NPC. Although the amount of Ni, Co, and Pd introduced into nanopores is small, the NPC properties change significantly. A bulk ferromagnetism is observed in the case of NPC with Co and Pd, but not in NPC:Ni. Co atoms in pores of NPC cause the formation of a new material, namely, a disordered ferromagnetic medium with some features in the Co atom distribution. Magnetic properties are strongly temperature-dependent. The temperature dependences of the conductivity and ESR integral intensity in NPC:Ni reveal an exponential growth with the same activation energy. The magnetic resonance spectrum of NPC:Pd consists of four signals for NPC which is produced from SiC. There are one ferromagnetic and three paramagnetic signals belonging to the carbon dangle sp3- and sp2-bonds kind and to the paramagnetic clusters of Pd atoms.
Similar content being viewed by others
References
Veinger, A.I., Shanina, B.D., Danishevskii, A.M., Popov, V.V., Gordeev, S.K., Grechinskaya, A.V.: Phys. Solid State 45, 1197–1206 (2003)
Shanina, B.D., Konchits, A.A., Kolesnik, S.P., Veynger, A.I., Danishevskii, A.M., Popov, V.V., Gordeev, S.K., Grechinskaya, A.V.: Carbon 41, 3027–3037 (2003)
Kyutt, R.N., Smorgonskaya, E.A., Danishevskii, A.M., Gordeev, S.K., Grechinskaya, A.V.: Phys. Solid State 41, 1359 (1999)
Avarbe, R.G., Gordeev, S.K., Grechinskaya, A.V., Kravchik, A.E., Kukushkina, Yu.A., Mazaeva, T.V., Sokolov, V.V.: Russian Federation Patent 2151737 (1997)
Dyson, F.J.: Phys Rev. 98, 349–359 (1955)
Baran, N.P., Maksimenko, V.M., Gavriljuk, V.G., Efimenko, S.P., Shanina, B.D., Smouk, S., Smouk, T.: Phys. Rev. B 48, 3224–3231 (1993)
Shanina, B.D., Veynger, A.I., Danishevskii, A.M., Kyutt, R.N., Shuman, V.B., Kurdjukov, D.A., Gordeev, S.K.: Phys. Status Solidi B 244, 2629–2640 (2007)
Veinger, A.I., Shanina, B.D., Danishevskii, A.M., Shuman, V.B., Kurdjukov, D.A., Gordeev, S.K., Kukushkina, Yu.A.: Phys. Solid State 48, 172–176 (2006)
Korenblit, I.Ya., Shender, Ye.F.: Usp. Fiz. Nauk 126, 233–265 (1978)
Massalski, T.B. (ed.): Binary Alloy Phase Diagrams, p. 718. American Society for Metals, Metals Park, Ohio (1986)
Heckler, A.J., Winchell, P.G.: Trans. Metall. Soc. AIME 227, 732–738 (1963)
Kojima, H., Tebble, R.S., Williams, D.E.G.: Proc. R. Soc. A 260, 237–250 (1961)
Moriya, T.: J. Magn. Magn. Mater. 14, 1–46 (1979)
Mendoza, D., Morales, F., Escuderos, R., Walter, J.: J. Phys. Condens. Matter 11, L317–L322 (1999)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Shanina, B.D. Features of magnetic resonance in nanoporous carbon with pores filled with transition-metal atoms. Appl Magn Reson 35, 429–437 (2009). https://doi.org/10.1007/s00723-009-0174-4
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00723-009-0174-4