Spin Excitation Spectrum ofLa1-xAxMnO3
- 15 May 1996
- journal article
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 65 (5) , 1174-1177
- https://doi.org/10.1143/jpsj.65.1174
Abstract
As an effective model to describe perovskite-type manganates (La,$A$)MnO$_3$, the double-exchange model on a cubic lattice is investigated. Spin excitation spectrum of the model in the ground state is studied using the spin wave approximation. Spin wave dispersion relation observed in the inelastic neutron scattering experiment of La$_{0.7}$Pb$_{0.3}$MnO$_3$ is reproduced. Effective values for the electron bandwidth as well as Hund's coupling is estimated from the data.Comment: 10 pages LaTeX including 4 PS figureKeywords
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