CaCrO3: an anomalous antiferromagnetic metallic oxide

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Authors
Komarek, A. C.
Streltsov, S. V.
Isobe, M.
Moeller, T.
Hoelzel, M.
Senyshyn, A.
Trots, D.
Fernandez-Diaz, M. T.
Hansen, T.
Gotou, H.
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Abstract
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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.
Keywords
Condensed Matter - Strongly Correlated Electrons
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