Spin Waves, Phase Separation, and Interphase Boundaries in Double Exchange Magnets
Strongly Correlated Electrons
2008-11-26 v2 Materials Science
Abstract
We study a classical double exchange magnet with direct antiferromagnetic superexchange coupling, J, between the localized spins. It is shown that the de-stabilization of the ferromagnetic ground state with increasing J leads to phase separation; the latter always preempts the spin-wave instability (softening of the magnon spectrum). It is also found that the boundaries separating the ferromagnetic and antiferromagnetic areas of the sample tend to be abrupt.
Cite
@article{arxiv.cond-mat/0110322,
title = {Spin Waves, Phase Separation, and Interphase Boundaries in Double Exchange Magnets},
author = {D. I. Golosov},
journal= {arXiv preprint arXiv:cond-mat/0110322},
year = {2008}
}
Comments
3 pages, LaTeX-Revtex, 2 PostScript figures; misprints corrected, including those in the published version