Unsaturated magnetoconductance of epitaxial La0.7Sr0.3MnO3 thin films in pulsed magnetic fields up to 60 T

TL;DR

This study investigates the resistance and magnetoconductance of epitaxial La0.7Sr0.3MnO3 thin films in pulsed magnetic fields up to 60 T, revealing unsaturated magnetoconductance and insights into colossal magnetoresistance mechanisms.

Contribution

It provides new experimental data on magnetoconductance in high magnetic fields and analyzes the magnetic and transport properties of La0.7Sr0.3MnO3 thin films.

Findings

Unsaturated magnetoconductance observed up to 60 T

Magnetoresistance curves fitted by the Brillouin function

Identification of magnetically polarized regions and hopping mechanism

Abstract

We report on the temperature and field dependence of resistance of La0.7Sr0.3MnO3 thin films over a wide temperature range and in pulsed magnetic fields up to 60 T. The epitaxial La0.7Sr0.3MnO3 thin films were deposited by laser molecular beam epitaxy. High magnetic field magnetoresistance curves were fitted by the Brillouin function, which indicated the existence of magnetically polarized regions and the underlying hopping mechanism. The unsaturated magnetoconductance was the most striking finding observed in pulsed magnetic fields up to 60 T. These observations can deepen the fundamental understanding of the colossal magnetoresistance in manganites with strong correlation of transport properties and magnetic ordering.