Realization of La2MnVO6: Search for half-metallic antiferromagnetism?

TL;DR

This study synthesizes La2MnVO6, revealing its ferrimagnetic behavior and non-half-metallic nature, with insights into its structure and magnetic ion states, challenging the search for half-metallic antiferromagnetism in this compound.

Contribution

The paper provides the first synthesis and detailed characterization of La2MnVO6, clarifying its magnetic properties and electronic structure, and demonstrating it is not a half-metallic antiferromagnet.

Findings

La2MnVO6 has a cubic, partly ordered double perovskite structure.

The compound exhibits ferrimagnetism and variable-range hopping conductivity.

Mn and V ions are both trivalent, with Mn3+ in a high-spin state.

Abstract

Single-phase polycrystalline La2MnVO6 samples were synthesized by arc melting and characterized by X-ray diffraction, magnetization and resistivity measurements. We find that the compound has cubic (space group), partly ordered double perovskite structure. The sample exhibits ferrimagnetic behavior and variable-range hopping conductivity. We conclude based on the magnetic properties that both Mn and V ions are trivalent; moreover, the Mn3+ ions are in a high-spin state, which is the reason that the compound is not a half-metallic antiferromagnet.