1999/11/30 by J. M. Roman, José Marı́a Román, Joan Soto +1
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Rare-earth and actinide compounds #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.62.3300
published as Phys. Rev. B62 (2000) 3300 · 34 pages, latex file, 1 eps included figure. Minor changes, published version
openalex publication_date 2000/08/01 · arxiv created 2000/12/12 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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)\ensuremath→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.