The Volume Degree of Freedom in Itinerant Electron Ferromagnetism

  • Duk Joo Kim
Chapter

Abstract

In Chapter 5 we discussed the elastic property of a metal. There we noted that the result (5.4.27) succeeds in qualitatively explaining the various aspects of the elastic behavior of ferromagnetic metals. If we look into the details of experimental results, however, we find that our result in Chapter 5 is not satisfactory. See, for instance, Figs.5.2 (a) and 5.2(b): as temperature lowers toward T C from above, the elastic constants first increase before decreasing. Such a behavior can not be accounted for by (5.4.27). How can we, then, improve such a result of Chapter 5? In this chapter we show that the goal is achieved by properly taking into account the contributions of thermal phonons to elastic constants; the situation is exactly the same as in Chapter 6 of going beyond the Stoner model in studying itinerant electron magnetism.

Keywords

Magnetic Susceptibility Bulk Modulus Thermal Expansion Coefficient Spin Wave Equilibrium Volume 
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Copyright information

© Springer Science+Business Media New York 1999

Authors and Affiliations

  • Duk Joo Kim
    • 1
  1. 1.Late of Aoyama Gakuin UniversityTokyoJapan

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