Influence of Chemical Doping on Magnetic Characteristic of ErMn₁−ᵪFeᵪO₃ Multiferroic System

Abstract

The structural stability and magnetic properties of ${\text {ErMn}}_{1-x}$ FexO3 ( $0 \leq x \leq 1$ ) prepared by a self-combustion method are presented. The compounds crystallize in hexagonal structure for $0 \leq x \leq 0.2$ and in orthorhombic structure for $0.5 \leq x \leq 1$ . The coexistence of hexagonal and orthorhombic phases was observed in the concentration range $0.2 \leq x \leq 0.5$ . The candidates for multiferroicity are the hexagonal compounds, and for these compounds the increase in $T_{N}$ from 76.9 K ( $x = 0$ ) to 82.4 K ( $x = 0.2$ ) was observed. The paramagnetic to weak ferromagnetic/canted antiferromagnetic phase transition is of higher order. The ordering of Er ions is induced by the ordering of $3d$ sublattice, and the temperature of the ordering does not shift significantly with x.