Combining infrared reflectivity, transport, susceptibility and several diffraction techniques, we find compelling evidence that CaCrO3 is a rare case of a metallic and antiferromagnetic transition-metal oxide with a three-dimensional electronic structure. LSDA calculations correctly describe the metallic behavior as well as the anisotropic magnetic ordering pattern of C type: The high Cr valence state induces via sizeable pd hybridization remarkably strong next-nearest neighbor interactions stabilizing this ordering. The subtle balance of magnetic interactions gives rise to magneto-elastic coupling, explaining pronounced structural anomalies observed at the magnetic ordering transition.
@article{arxiv.0804.1071,
title = {CaCrO3: an anomalous antiferromagnetic metallic oxide},
author = {A. C. Komarek and S. V. Streltsov and M. Isobe and T. Moeller and M. Hoelzel and A. Senyshyn and D. Trots and M. T. Fernandez-Diaz and T. Hansen and H. Gotou and T. Yagi and Y. Ueda and V. I. Anisimov and M. Grueninger and D. I. Khomskii and M. Braden},
journal= {arXiv preprint arXiv:0804.1071},
year = {2009}
}