The European Physical Journal B

, Volume 77, Issue 1, pp 47–55 | Cite as

Ferromagnetic phases in spin-Fermion systems

Solid State and Materials

Abstract

Spin-Fermion systems which obtain their magnetic properties from a system of localized magnetic moments being coupled to conducting electrons are considered. The dynamical degrees of freedom are spin-s operators of localized spins and spin-1/2 Fermi operators of itinerant electrons. Renormalized spin-wave theory, which accounts for the magnon-magnon interaction, and its extension are developed to describe the two ferromagnetic phases in the system: low temperature phase 0 < T < T*, where all electrons contribute the ordered ferromagnetic moment, and high temperature phase T* < T < T C , where only localized spins form magnetic moment. The magnetization as a function of temperature is calculated. The theoretical predictions are utilize to interpret the experimentally measured magnetization-temperature curves of UGe2.

Keywords

Localize Electron Ferromagnetic Phasis Hamiltonian Equation Spontaneous Magnetization Exchange Constant 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    N. Karchev, Phys. Rev. B 77, 012405 (2008) ADSCrossRefGoogle Scholar
  2. 2.
    T. Moriya, A. Kawabata, J. Phys. Soc. 34, 639 (1973) ADSCrossRefGoogle Scholar
  3. 3.
    T. Moriya, A. Kawabata, J. Phys. Soc. 35, 669 (1973) ADSCrossRefGoogle Scholar
  4. 4.
    The works are summarized in T. Moriya, Spin Fluctuations in Itinerant Electron Magnetizm (Springer-Verlag, Berlin 1985) Google Scholar
  5. 5.
    G. Lonzarich, L. Taillefer, J. Phys. C 18, 4339 (1985) ADSCrossRefGoogle Scholar
  6. 6.
    T. Kasuya, Prog. Theor. Phys. 16, 45 (1956) MATHADSCrossRefGoogle Scholar
  7. 7.
    K. Yosida, Phys. Rev. 106, 893 (1957) ADSCrossRefGoogle Scholar
  8. 8.
    A.A. Rudermann, C. Kittel, Phys. Rev. 96, 99 (1954) ADSCrossRefGoogle Scholar
  9. 9.
    W. Nolting, S. Rex, S. Mathi Jaya, J. Phys.: Condens. Matter 9, 1301 (1997) ADSCrossRefGoogle Scholar
  10. 10.
    N.D. Mermin, H. Wagner, Phys. Rev. Lett. 17, 1133 (1966) ADSCrossRefGoogle Scholar
  11. 11.
    S.S. Saxena, P. Agarwal, K. Ahilan, F.M. Grosche, R.K.W. Haselwimmer, M.J. Steiner, E. Pugh, I.R. Walker, S.R. Julian, P. Monthoux, G.G. Lonzarich, A. Huxley, I. Sheikin, D. Braithwaite, J. Flouquet, Nature (London) 406, 587 (2000) ADSCrossRefGoogle Scholar
  12. 12.
    A. Huxley, I. Sheikin, E. Ressouche, N. Kernavanois, D. Braithwaite, R. Calemczuk, J. Flouquet, Phys. Rev. B 63, 144519 (2001) ADSCrossRefGoogle Scholar
  13. 13.
    N. Tateiwa, T. Kobayashi, K. Hanazono, K. Amaya, Y. Haga, R. Settai, Y. Onuki, J. Phys. Condens. Matter 13, L17 (2001) ADSCrossRefGoogle Scholar
  14. 14.
    N. Tateiwa, K. Hanazono, T.C. Kobayashi, K. Amaya, T. Inoue, K. Kindo, Y. Koike, N. Metoki, Y. Haga, R. Settai, Y. Onuki, J. Phys. Soc. Jpn 70, 2876 (2001) ADSCrossRefGoogle Scholar
  15. 15.
    C. Pfleiderer, A.D. Huxley, Phys. Rev. Lett. 89, 147005 (2002) ADSCrossRefGoogle Scholar
  16. 16.
    G. Motoyama, S. Nakamura, H. Kadoya, T. Nishioka, N.K. Sato, Phys. Rev. B 65, 020510 (2001) CrossRefGoogle Scholar
  17. 17.
    D. Schmeltzer, Phys. Rev. B 43, 8650 (1991) ADSCrossRefGoogle Scholar
  18. 18.
    A.B. Shick, W.E. Pickett, Phys. Rev. Lett. 86, 300 (2001) ADSCrossRefGoogle Scholar
  19. 19.
    C. Pfleiderer, Rev. Mod. Phys. 81, 1551 (2009) ADSCrossRefGoogle Scholar
  20. 20.
    G. Oomi, K. Kagayama, K. Nishimura, S.W. Yun, Y. Onuki, Physica B 206, 207, 515 (1995) Google Scholar
  21. 21.
    P.P. Craig, W.I. Goldburg, T.A. Kitchens, J.I. Budnick, Phys. Rev. Lett. 19, 1334 (1967) ADSCrossRefGoogle Scholar
  22. 22.
    T. Ito, H. Kumigashira, S. Souma, T. Takahashi, Y. Haga, Y. Onuki, J. Phys. Soc. Jpn 71, Suppl. 262 (2002) Google Scholar
  23. 23.
    S. Watanabe, K. Miyake, J. Phys. Soc. Jpn 71, 2489 (2002) ADSCrossRefGoogle Scholar
  24. 24.
    K.G. Sandeman, G.G. Lonzarich, A.J. Schofield, Phys. Rev. Lett., 90, 167005 (2003) Google Scholar
  25. 25.
    A.B. Shick, V. Janis, V. Drchal, W. Picket, Phys. Rev. B 70, 134506 (2004) ADSCrossRefGoogle Scholar

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  1. 1.Department of PhysicsUniversity of SofiaSofiaBulgaria

Personalised recommendations