Magnetic Properties of Bismuth Ferrite Nanopowder Obtained by Mechanochemical Synthesis

TL;DR

This study investigates the magnetic properties of BiFeO3 nanopowders synthesized via mechanochemical methods, highlighting how post-synthesis processing affects their structure and magnetic performance.

Contribution

It presents a novel synthesis method for BiFeO3 nanopowders at room temperature and analyzes how different post-processing steps influence their magnetic properties.

Findings

Magnetic properties improve significantly in as-prepared powders.

Post-synthesis processing affects nanopowder size and phase composition.

Differences observed in amorphous layers and secondary phases.

Abstract

Multiferroic bismuth ferrite (BiFeO3) nanopowders have been obtained in room temperature by mechanical synthesis. Depending on the post-synthesis processing the nanopowders have exhibited differences in the mean sizes, presence of amorphous layer and/or secondary phases. Extended magnetic study performed for fresh, annealed and hot-pressed nanopowders have revealed substantial improvement of the magnetic properties in the as-prepared powder.