# Cooperative dynamics in doped manganite films: Phonon anomalies in the ferromagnetic state

@article{Hartinger2004CooperativeDI,
title={Cooperative dynamics in doped manganite films: Phonon anomalies in the ferromagnetic state},
author={Ch. Hartinger and Franz Mayr and Alois Loidl and Thilo Kopp},
journal={Physical Review B},
year={2004},
volume={70},
pages={134415}
}
• Published 1 April 2004
• Physics
• Physical Review B
We present optical measurements of phononic excitations in La$_{2/3}$Ca$_{1/3}$MnO$_{3}$ (LCMO) and La$_{2/3}$Sr$_{1/3}$MnO$_{3}$ (LSMO) thin films covering the full temperature range from the metallic ferromagnetic to the insulating paramagnetic phase. All eight phonons expected for the R$\bar{3}$c symmetry in LSMO and 17 out of the expected 25 phonons for the Pnma symmetry in LCMO have been determined. Close to the ferromagnetic-to-paramagnetic transition both compounds reveal an anomalous…
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