Issues »  Volume 36, Issue 5

Magnetic Phase Diagrams of Two-Component Disordered B.C.C. Substitutional Alloys with Strong Electron Correlations

V. V. Lizunov$^{1}$, E. G. Len$^{1}$, I. M. Melnyk$^{1}$, M. V. Ushakov$^{1}$, T. S. Len$^{2}$, V. A. Tatarenko$^{1}$

$^{1}$G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03680 Kyiv-142, Ukraine
$^{2}$National Aviation University, 1 Kosmonavta Komarova Ave., 03058 Kyiv, Ukraine

Received: 29.11.2013; final version - 05.05.2014. Download: PDF

Electron-energy spectra and diagrams of magnetic-phase states of disordered b.c.c. binary substitutional alloys for various values of the parameter of electron scattering by atoms of both constituents are investigated. To describe properties of these alloys, one-band tight-binding model taking into account electron-electron interactions in the correlated random field approximation is proposed. As shown, the type of magnetic order of alloy is defined by the energy parameters of the Coulomb repulsion of electrons with opposite spins at the one site, the average electron density, and value of the atomic scattering potential. As opposed to the one-component systems, in alloys at issue, the antiferromagnetic ordering has a threshold character, i.e., for all possible values of the mean electron concentration, it cannot be set at arbitrarily small values of the potential of the Coulomb repulsion of electrons on the one site.

Key words: electronic structure, strong electron correlations, magnetic phase diagram, magnetic alloys.

URL: http://mfint.imp.kiev.ua/en/abstract/v36/i05/0575.html

DOI: https://doi.org/10.15407/mfint.36.05.0575

PACS: 71.10.Fd, 71.20.Be, 71.27.+a, 71.28.+d, 71.55.Jv, 75.10.Lp, 75.40.Cx

Citation: V. V. Lizunov, E. G. Len, I. M. Melnyk, M. V. Ushakov, T. S. Len, and V. A. Tatarenko, Magnetic Phase Diagrams of Two-Component Disordered B.C.C. Substitutional Alloys with Strong Electron Correlations, Metallofiz. Noveishie Tekhnol., 36, No. 5: 575—588 (2014) (in Russian)

REFERENCES
  1. E. Dagotto, Science, 309: 257 (2005). Crossref
  2. J. Hubbard, Proc. Roy. Soc., 276, No. 1365: 238 (1963). Crossref
  3. J. Hubbard, Proc. Roy. Soc., 277, No. 1369: 237 (1964). Crossref
  4. J. Hubbard, Proc. Roy. Soc., 281, No. 1386: 401 (1964). Crossref
  5. D. Vollhardt, Annalen der Physik, 524, Iss. 1: 1 (2012). Crossref
  6. K. Byczuk, M. Ulmke, and D. Vollhardt, Phys. Rev. Lett., 90: 196403 (2003). Crossref
  7. K. Byczuk, W. Hofstetter, and D. Vollhardt, Phys. Rev. B, 69: 045112 (2004). Crossref
  8. P. Lombardo, R. Hayn, and G. I. Japaridze, Phys. Rev. B, 74: 085116 (2006). Crossref
  9. D. Semmler, K. Byczuk, and W. Hofstetter, Phys. Rev. B, 81: 115111 (2010). Crossref
  10. V. F. Los' and S. P. Repetsky, Metody Teorii Neuporyadochennykh Sistem. Elektronnye Svoystva Splavov (Methods for Disordered Systems Theory. Electronic Properties of Alloys) (Kiev: Naukova Dumka: 1995) (in Russian).
  11. S. P. Repetsky, V. B. Molodkin, I. G. Vyshivanaya, E. G. Len, I. N. Melnyk, O. I. Musienko, and B. V. Stashchuk, Uspehi Fiziki Metallov, 10, No. 3: 283 (2009) (in Russian). Crossref
  12. M. H. Hettler, A. N. Tahvildar-Zadeh, and M. Jarrell, Phys. Rev. B, 58: R7475 (1998). Crossref
  13. S. P. Repetsky and T. D. Shatnij, Teoreticheskaya i Matematicheskaya Fizika, 131, No. 3: 456 (2002) (in Russian). Crossref
  14. Yu. A. Izyumov, Uspekhi Fizicheskikh Nauk, 165, No. 4: 403 (1995) (in Russian). Crossref
  15. H. Fukuyama, Phys. Rev. B, 5, No. 8: 2872 (1972). Crossref
  16. E. G. Len, I. M. Melnyk, S. P. Repetsky, V. V. Lizunov, and V. A. Tatarenko, Materialwissenschaft und Werkstofftechnik (Materials Science and Engineering Technology), 42, No. 1: 47 (2011). Crossref
  17. S. P. Repetsky, T. D. Shatnij, T. S. Len, and E. G. Len, Fiz. Met. Metalloved., 93, No. 3: 9 (2002) (in Russian).
  18. A. N. Andriotis, E. N. Economou, L. Qiming, and C. M. Soukoulis, Phys. Rev. B, 47, No. 15: 9208 (1993). Crossref
  19. E. N. Economou, C. T. White, and R. R. DeMarco, Phys. Rev. B, 18, No. 8: 3946 (1978). Crossref
  20. C. T. White and E. N. Economou, Phys. Rev. B, 18, No. 8: 3959 (1978). Crossref
  21. R. R. DeMarco, E. N. Economou, and C. T. White, Phys. Rev. B, 18, No. 8: 3968 (1978). Crossref
  22. A. N. Andriotis, P. N. Poulopoulos, and E. N. Economou, Solid State Communications, 39: 1175 (1981). Crossref
  23. A. N. Andriotis, E. N. Economou, and C. M. Soukoulis, J. Phys.: Condens. Matter., 5, No. 26: 4505 (1993). Crossref

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