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Fermi Liquid Effects in Ferromagnetic Metals
Author(s) -
Carneiro G. M.,
Pereira P. R. Rodrigues
Publication year - 1977
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220810106
Subject(s) - quasiparticle , condensed matter physics , magnon , fermi liquid theory , physics , ferromagnetism , electron , scattering , fermi gas , fermi surface , quantum mechanics , superconductivity
Microscopic Fermi‐liquid theory is used together with the s–f or s–d exchange model to discuss Fermi‐liquid effects in ferromagnetic metals at zero temperature. The contribution from exchange of virtual magnons to the quasiparticle scattering amplitude and the Landau quasiparticle inter‐action are calculated in the Migdal approximation. It is shown that exchange of magnons lead to strong forward electron–electron scattering. It is found that the quasiparticle effective mass and the spin susceptibility of the conduction electrons are strongly enhanced, whereas their compressibility is unaffected by electron–magnon interactions.