Sodium Doped LaMnO3 Thin Films: Influence of Substrate and Thickness on Physical Properties

TL;DR

This study investigates how substrate type, orientation, and film thickness affect the physical properties, especially magnetoresistance, of sodium-doped LaMnO3 thin films, achieving high MR near room temperature.

Contribution

It provides a systematic analysis of substrate and thickness effects on LaMnO3 thin films, optimizing conditions for high magnetoresistance.

Findings

Achieved MR values over 70% near room temperature.

Identified substrate and orientation influence on film properties.

Optimized synthesis conditions for smooth, high-MR films.

Abstract

In this paper we report the results about the synthesis and characterization of optimally doped La1-xNaxMnO3 thin films grown onto SrTiO3 (100), NdGaO3 (100) and NdGaO3 (110) for thickness ranging from 11 to 82 nm. The effect of substrate nature and orientation, film thickness and annealing procedure was investigated in order to optimize their magnetoresistance (MR). We obtained very smooth films displaying MR values greater than 70%, near to room temperature.