  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.
