Abstract
The magnetic properties of samples of nanoporous carbon with palladium clusters prepared from polycrystalline SiC have been studied over a wide range of temperatures. The specific magnetic moment rapidly decreases with increasing temperature. The obtained experimental magnetization curves have a nonlinear character but do not reach saturation even in a field of 10 kOe. Being constructed as functions of H/T, they lie on a universal curve, which suggests superparamagnetism of the system. The experimental curves have a hysteresis. The coercive force, first, decreases with increasing temperature and, then (in the range of 5–20 K), increases, thus forming a notch singularity. On the contrary, the residual magnetization rapidly decreases with increasing temperature. A conclusion on the prevailing contribution of superparamagnetic clusters to the magnetic subsystem is made.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
V. L. Moruzzi and P. M. Marcus, Phys. Rev. B: Condens. Matter 39, 471 (1989).
M. J. Zhu, D. M. Bylander, and M. Kleinman, Phys. Rev. B: Condens. Matter 42, 2874 (1990).
S. Bourab, C. Demangeat, A. Mokrani, and M. Dreysse, Phys. Lett. A 151, 103 (1990).
B. V. Reddy, S. N. Khanna, and B. I. Dunlap, Phys. Rev. Lett. 70, 3323 (1993).
K. Lee, Phys. Rev. B: Condens. Matter 58, 2391 (1998).
L. Fritsche, J. Noffke, and H. Eckardt, J. Phys. F: Met. Phys. 17, 943 (1987).
T. Taniyama, E. Ohta, and T. Sato, Europhys. Lett. 38(3), 195 (1997).
T. Shinohara, T. Sato, and T. Taniyama, Phys. Rev. Lett. 91(19), 197201–1 (2003).
J. Walter and H. Shinoyama, Phys. Lett. A 254, 65 (1999).
D. Mendoza, F. Morales, R. Escuderos, and J. Walter, J. Phys.: Condens. Matter 11, L317 (1999).
B. D. Shanina, A. M. Danishevskii, A. I. Veynger, D. A. Kurdyukov, and S. K. Gordeev, Fiz. Tverd. Tela (St. Petersburg) 51(3), 596 (2009) [Phys. Solid State 51 (3), 632 (2009)].
B. D. Shanina, A. M. Danishevskii, A. I. Veinger, A. A. Sitnikova, R. N. Kyutt, A. V. Shchukarev, and S. K. Gordeev, Zh. Eksp. Teor. Fiz. 136(4), 711 (2009) [JETP 109 (4), 609 (2009)].
Yu. I. Petrov, Clusters and Small Particles (Nauka, Moscow, 1986) [in Russian].
W. A. Mohun, in Proceedings of the 4th Biennial Conference on Carbon, University of Buffalo, Buffalo, New York, United States, 1959 (Pergamon, Oxford, 1959), p. 443; W. A. Mohun, US Patent No. 3,066,099 (1962); N. F. Fedorov, G. K. Ivakhnyuk, V. V. Tetenov, and G. V. Matyukhin, Zh. Prikl. Khim 54 (7), 1464 (1981); N. F. Fedorov, G. K. Ivakhnyuk, and D. N. Gavrilov, Zh. Prikl. Khim 55 (1), 46 (1982); Zh. Prikl. Khim 55 (1), 272 (1982).
V. Kuznetsov, S. Gordeev, and T. Ekstrom, in Proceedings of the 6th International Seminar on Double Layer Capacitors and Similar Energy Storage Devices, Deerfield Beach, Florida, United States, December 9–11, 1996; T. Ekstrom, S. Gordeev, V. Kuznetsov, and J. Cederstrom, in Proceedings of the 7th International Seminar on Double Layer Capacitors and Similar Energy Storage Devices, Deerfield Beach, Florida, United States, December 8–10, 1997.
The Physics of Metals, Vol. 1: Electrons, Ed. by J. Ziman (Cambridge University Press, Cambridge, 1969; Mir, Moscow, 1972), p. 427.
X. Teng, W. Q. Han, and M. Hucker, Angew. Chem., Int. Ed. 47, 2055 (2008).
N. A. Usov and Yu. B. Grebenshchikov, J. Appl. Phys. 106, 023917 (2009).
M. E. McHenry, S. A. Majetich, J. O. Artman, M. DeGraef, and S. W. Staley, Phys. Rev. B: Condens. Matter 49(16), 11 358 (1994).
F. C. Fonseca, G. F. Goya, R. F. Jardim, R. Muccillo, N. L. V. Carreño, E. Longo, and E. R. Leite, Phys. Rev. B: Condens. Matter 66, 104406 (2002).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © A.M. Danishevskii, T.L. Makarova, A.A. Sitnikova, B.D. Shanina, 2011, published in Fizika Tverdogo Tela, 2011, Vol. 53, No. 5, pp. 956–963.
Rights and permissions
About this article
Cite this article
Danishevskii, A.M., Makarova, T.L., Sitnikova, A.A. et al. Characteristics of magnetism in nanoporous carbon with palladium clusters. Phys. Solid State 53, 1017–1024 (2011). https://doi.org/10.1134/S1063783411050076
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063783411050076