Spin excitations in doped manganites

Authors
Oles, AM Feiner, LF
Citation
Am. Oles et Lf. Feiner, Spin excitations in doped manganites, ACT PHY P A, 97(1), 2000, pp. 193-196
Citations number
14
Categorie Soggetti
Physics
Journal title
ACTA PHYSICA POLONICA A
ISSN journal
05874246 → ACNP
Volume
97
Issue
1
Year of publication
2000
Pages
193 - 196
Database
ISI
SICI code
0587-4246(200001)97:1<193:SEIDM>2.0.ZU;2-Y
Abstract
We generalize the double exchange to describe holes doped in degenerate e(g ) orbitals in La(1-x)A(x)MnO(3) manganites, where A are divalent alkaline e arth ions. Assuming an orbital liquid of disordered e(g) orbitals we find i sotropic ferromagnetic exchange interactions which increase with hole dopin g. The magnon dispersion agrees very well with the experimental data in fer romagnetic metallic manganites.