Extended Dynamic Spin-Fluctuation Theory with Application to Iron

Abstract:

The problem of discontinuous phase transition in the dynamic spin-fluctuation theory is resolved by taking into account large anharmonic spin fluctuations and nonlocality of the mean Green function. The extended theory is applied to the calculation of magnetic properties of iron.

• Periodical: Solid State Phenomena (Volume 190)
• Pages: 55-58
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.190.55
• Online since: June 2012
• Authors: B.I. Reser, N.B. Melnikov, Vladimir I. Grebennikov
• Keywords: Finite-Temperature Magnetism, Phase Transition, Spin Fluctuations, Transition Metals

References

[1] B. I. Rezer and V. I. Grebennikov, Phys. Met. Metallogr. 85 (1998) 20-27.

[2] B. I. Reser and N. B. Melnikov, J. Phys.: Condens. Matter 20 (2008) 285205 (10 pp).

[3] T. Moriya, Spin Fluctuations in Itinerant Electron Magnetism, Springer, Berlin, (1985).

[4] N. B. Melnikov, B. I. Reser and V. I. Grebennikov, J. Phys. A: Math. Theor. 43 (2010) 195004 (19 pp).

[5] N. B. Melnikov, B. I. Reser and V. I. Grebennikov, J. Phys.: Condens. Matter 23 (2011) 276003 (11 pp).

[6] P. C. E. Stamp, J. Phys. F: Met. Phys. 15 (1985) 1829-1865.

[7] Y. Kakehashi, M.A.R. Patoary and T. Tamashiro, Phys. Rev. B 81 (2010) 245133 (13 pp).

[8] J. Crangle and G. M. Goodman, Proc. Roy. Soc. Lond. A 321 (1971) 477-491.

[9] E. P. Wohlfarth, Ferromagnetic Materials, vol. 1, North-Holland, Amsterdam, (1980).