Phase diagram and influence of defects in the double perovskites

TL;DR

This paper studies the phase diagram of Sr_{2-x} La_x Fe Mo O_6 double perovskites, exploring how doping and antisite disorder influence magnetic phases and properties.

Contribution

It provides a detailed analysis of the phase diagram including effects of doping and disorder in double perovskites, revealing new magnetic phases.

Findings

Homogeneous half-metallic ferrimagnetic phase identified

Antiferromagnetic phases emerge at high doping levels

Disorder induces ferrimagnetic phases with reduced saturation magnetization

Abstract

The phase diagram of the double perovskites of the type Sr_{2-x} La_x Fe Mo O_6 is analyzed, with and without disorder due to antisites. In addition to an homogeneous half metallic ferrimagnetic phase in the absence of doping and disorder, we find antiferromagnetic phases at large dopings, and other ferrimagnetic phases with lower saturation magnetization, in the presence of disorder.