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Spin waves in canted phases: An application to doped manganites

Román, José María ; Soto, Joan

Physical review. B, Condensed matter, 2000-08, Vol.62 (5), p.3300-3315 [Periódico revisado por pares]

The American Physical Society

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  • Título:
    Spin waves in canted phases: An application to doped manganites
  • Autor: Román, José María ; Soto, Joan
  • Assuntos: Field theory (Physics) ; Magnetic materials ; Materials magnètics ; Nuclear spin ; Spin (Física nuclear) ; Teoria de camps (Física)
  • É parte de: Physical review. B, Condensed matter, 2000-08, Vol.62 (5), p.3300-3315
  • Descrição: We present the effective lagrangian for low energy and momentum spin waves in canted phases at next to leading order in the derivative expansion. The symmetry breaking pattern SU(2) --> 1 of the internal spin group and that of the crystallographic space group imply that there is one ferromagnetic and one antiferromagnetic spin wave. The interaction of the spin waves with the charge carriers is also discussed for canted, ferromagnetic and antiferromagnetic phases. All this together allows us to write the doping dependence of the dispersion relation parameters for doped manganites. We point out that the spin waves posses distinctive characteristics which may allow us to experimentally differentiate canted phases from phase separation regions in doped manganites. We present the effective lagrangian for low energy and momentum spin waves in canted phases at next to leading order in the derivative expansion. The symmetry breaking pattern SU(2) --> 1 of the internal spin group and that of the crystallographic space group imply that there is one ferromagnetic and one antiferromagnetic spin wave. The interaction of the spin waves with the charge carriers is also discussed for canted, ferromagnetic and antiferromagnetic phases. All this together allows us to write the doping dependence of the dispersion relation parameters for doped manganites. We point out that the spin waves posses distinctive characteristics which may allow us to experimentally differentiate canted phases from phase separation regions in doped manganites.
  • Editor: The American Physical Society
  • Idioma: Inglês
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