Thickness and temperature dependence of the magnetodynamic damping of pulsed laser deposited ${\text{La}}_{0.7}{\text{Sr}}_{0.3}{\text{MnO}}_3$ on (111)-oriented SrTi${\text{O}}_3$

Abstract

We have investigated the magnetodynamic properties of ${\text{La}}_{0.7}{\text{Sr}}_{0.3}{\text{MnO}}_3$ (LSMO) films of thickness 10, 15 and 30 nm grown on (111)-oriented SrTi${\text{O}}_3$ (STO) substrates by pulsed laser deposition. Ferromagnetic resonance (FMR) experiments were performed in the temperature range 100--300 K, and the magnetodynamic damping parameter $\alpha$ was extracted as a function of both film thickness and temperature. We found that the damping is lowest for the intermediate film thickness of 15 nm with $\alpha \approx 2\cdot 10^{-3}$, where $\alpha$ is relatively constant as a function of temperature well below the Curie temperature of the respective films.

Accepted for publication in Journal of Magnetism and Magnetic Materials

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