Orbital-ordering-induced anomalous softening of the ferromagnetic spin waves in perovskite manganites
arXiv:cond-mat/0005497 · doi:10.1016/S0304-8853(00)00639-9
Abstract
Spin wave excitations were measured in the ferromagnetic phase of Nd$_{1/2}$Sr$_{1/2}$MnO$_{3}$ by neutron scattering. This compound is located in proximity to the A-type antiferromagnetic state, and it shows a clear anisotropy and anomalous softening of the spin wave excitations. The softening in the ferromagnetic phase is induced by the orbital ordering.
2 pages, 1 figure, proceeding of ICM2000. Corrected typos