Magnetic States of Nanoparticles with RKKY Interaction

Abstract:

Conditions of phase transitions in systems of identical ferromagnetic spherical nanoparticles randomly distributed in metal nonmagnetic matrix and superlattices of small number of nanoparticles with the Ruderman-Kittel-Kasuya-Yosida interaction are researched. In the framework of the Ising model the behavior of superspins is well described with the random interaction field method. The alteration of the effective magnetic moment due to the change in volume affects the choice of the magnetic state of the system: ferromagnetic spin glass or antiferromagnetic spin glass. The ground state of superlattice depends on the distance between particles.

• Periodical: Advanced Materials Research (Volumes 774-776)
• Pages: 523-527
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.774-776.523
• Online since: September 2013
• Authors: Valery I. Belokon, Konstantin V. Nefedev, Vitalii Y. Kapitan, Olga I. Dyachenko
• Keywords: Ising Model, Nanoparticle, Phase Transition, Ruderman-Kittel-Kasuya-Yosida Interaction, Spin Glass, Superlattice

References

[1] S. H. Charap, Phys. Rev. 126, (1962) 1393.

[2] J. J. Le Guillou, J. Zinn-Justin, Phys. Rev. B 21, (1980) 3976.

[3] J. J. Le Guillou, J. Zinn-Justin, Phys. Lett. (Paris) 46 L, (1985) 137.

[4] S. A. Antonenko, A. I. Sokolov, Phys. Rev. E 51, (1995) 1894.

[5] K. Htoutou, A. Oubelkacem, Magn. Magn. Mater. 288, (2005) 259.

[6] Yu. Kirienko, L. Afremov, Journal of Physics: Conference Series 410, (2013) 012017.

[7] R. Skomski, Europhys. Lett. 48, (1999) 455.

[8] M. A. Ruderman, C. Kittel, Phys. Rev. 96, (1954) 99.

[9] T. Kasuya, Progr. Theor. Phys. 16, (1956) 45.

[10] K. Yosida, Phys. Rev. 106, (1957) 893.

[11] V.I. Belokon, K.V. Nefedev, SSP 44, (2002) 1632.

[12] A.L. Efros, Physics and Geometry of disorder, (Science, Moscov, 1982), 176.

[13] D. Stauffer, Introduction to percolation theory, (Taylor\&Francis, London, 1994), 192.