CaCrO3: an anomalous antiferromagnetic metallic oxide

Komarek, A. C.; Streltsov, S. V.; Isobe, M.; Moeller, T.; Hoelzel, M.; Senyshyn, A.; Trots, D.; Fernandez-Diaz, M. T.; Hansen, T.; Gotou, H.; Yagi, T.; Ueda, Y.; Anisimov, V. I.; Grueninger, M.; Khomskii, D. I.; Braden, M.

CaCrO3: an anomalous antiferromagnetic metallic oxide

Authors

Fernandez-Diaz, M. T.

Hansen, T.

Gotou, H.

Description

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.