Half metallic antiferromagnets (HMAFM) have been proposed theoretically long ago but have not been realized experimentally yet. Recently, a double perovskite compound, LaSrVMoO6, has been claimed to be an almost real HMAFM system. Here, we report detailed experimental and theoretical studies on this compound. Our results reveal that the compound is neither a half metal nor an ordered antiferromagnet. Most importantly, an unusual chemical fluctuation is observed locally, which finally accounts for all the electronic and magnetic properties of this compound.
@article{arxiv.1107.1309,
title = {Atomic scale chemical fluctuation in LaSrVMoO6: A proposed halfmetallic antiferromagnet},
author = {Somnath Jana and Vijay Singh and S. D. Kaushik and Carlo Meneghini and Prabir Pal and Ronny Knut and Olof Karis and Indra Dasgupta and Vasudeva Siruguri and Sugata Ray},
journal= {arXiv preprint arXiv:1107.1309},
year = {2015}
}