Theory on the Itinerant Ferrmagnetism in the 3d-Transition Metal System

スポンサーリンク

概要

• 論文の詳細を見る

• Keeping nickel, cobalt and iron in rnind, xve investigate the origin of the itinerant ferrornag-netism. Recent experiments show that the systerns should be in an interumediate coupling regime,where the band width and the interaction energy are of the sarrte order of magnittudes. To treatstzch a sittnation, we generalize the Gutzwiller approximation. In that, we take account of theeffect of the band degeneracy and the Hund's-rtrle coupling in addition to the on-site repulsion.In generalizing the Gutzwiller approxinuation to the bands with degeneracy, we introduce theintuitive xvay to give the required expressions. After the discussion on nickel, the condition forthe incomplete ferrornagnetism, observed in cobalt and iron, is argued. Phase diagrams, whichshow the interplay between the band shape peculiarity and the Hund's-rvtle coupling, are given.It is found that for the 3d-transition metal systems, both of the Hund's-rule cotrpling and thespecial feature of the density of states are necessary to explain the itinerant ferroznagnetisna.

• 社団法人日本物理学会の論文
• 1996-04-15

著者

• Okabe Takuya

  Department Of Physics Faculty Of Science Kyoto University

• OKABE Takuya

  Department of Physics,Kyoto University

関連論文

• Spin Wave and Stability of the Double Exchange Ferromagnet : Condensed Matter and Statistical Physics
• Generalization of Gutzwiller Approximation
• Electrical Conductivity of Fermi Liquids. : II. Quasiparticle Transport
• Itinerant Ferromagnetism in Nickel
• Electrical Conductivity of Fermi Liquids. I. Many-Body Effect on the Drude Weight
• Theory on the Itinerant Ferrmagnetism in the 3d-Transition Metal System
• Hund's-Rule Coupling Effect in Itinerant Ferromagnetism : Condensed Matter and Statistical Physics
• Theoretical Studies on the Double Exchange Ferromagnet

スポンサーリンク