Vanishing of Electron-Hole Asymmetry in Nano-Sized Charge Ordered Manganites Pr(1-x)Ca(x)MnO3 (x=0.36, 0.64)- EPR Studies

TL;DR

This study investigates how electron-hole asymmetry in Pr(1-x)CaxMnO3 manganites diminishes at the nanoscale, revealing changes in magnetic properties and charge order behavior through EPR measurements.

Contribution

It demonstrates the vanishing of electron-hole asymmetry in nanoparticles, linking it to ferromagnetic fluctuations and charge order melting, which is a novel insight.

Findings

Electron-hole asymmetry disappears in nanoparticles.

Opposite g-shifts in bulk are not observed in nanoparticles.

Charge order melting correlates with magnetic fluctuations.

Abstract

We observe a disappearance of electron-hole asymmetry in hole and electron doped manganites of composition Pr(1-x)Ca(x)MnO3 (x=0.36, 0.64), as reflected in the g-parameter values. The bulk property of opposite g-shifts in room temperature seems to have disappeared in nanoparticles. We analyze the results in the light of ferromagnetic fluctuations and melting of charge order in nanoparticles.