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$\text{O}_3$

TL;DR

This study examines how the magnetodynamic damping of La0.7Sr0.3MnO3 thin films varies with thickness and temperature, revealing optimal damping at 15 nm thickness and stability across a broad temperature range.

Contribution

It provides new insights into the thickness and temperature dependence of magnetodynamic damping in pulsed laser deposited LSMO films on SrTiO3 substrates.

Findings

Damping is lowest at 15 nm thickness.

Damping parameter remains relatively constant below Curie temperature.

Optimal damping occurs at intermediate film thickness.

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.