The spin waves in the double exchange interaction systems
Journal
Journal of the Physical Society of Japan
Journal Volume
69
Journal Issue
7
Pages
2261-2268
Date Issued
2000
Author(s)
Abstract
We performed a detailed study of the double exchange interaction. Having rearranged Kubo and Ohata's Hamiltonian [J. Phys. Soc. Jpn. 33 (1972) 21], we found that it can be treated perturbatively for the temperaure lower than TC. The spin wave propagator was calculated and the spin stiffness was computed. It agrees reasonablly well with experimental results. We believe that the double exchange interaction is the fundamental mechanism in the perovskite manganites.
Type
journal article