Galvanomagnetic properties and noise in a barely metallic film of V2O3

TL;DR

This study investigates the magnetotransport and noise characteristics of a strained V2O3 thin film, revealing spin-fluctuation dominance at low temperatures and similarities to high-pressure single crystal behavior.

Contribution

First detailed analysis of galvanomagnetic properties and noise in a strained V2O3 film, linking it to pressure-induced effects in single crystals.

Findings

Conductivity fluctuations freeze out around 10K.

Spin-configuration fluctuations dominate at low temperatures.

Magnetotransport properties resemble those of high-pressure V2O3 crystals.

Abstract

We have measured the magnetotransport properties of a strained metallic V2O3 thin film. Most of the properties are similar to V2O3 single crystals that have been submitted to a large pressure. In addition, resistance noise analysis indicates that conductivity fluctuations are freezing out at T\approx 10K. Examination of a range of measurements leads to the conclusion that spins-configuration fluctuations dominate in the low temperature regime.