Komarek, A. C., Moeller, T., Isobe, M., Drees, Y., Ulbrich, H., Azuma, M., Fernandez-Diaz, M. T., Senyshyn, A., Hoelzel, M., Andre, G., Ueda, Y., Grueninger, M. and Braden, M. (2011). Magnetic order, transport and infrared optical properties in the ACrO(3) system (A = Ca, Sr, and Pb). Phys. Rev. B, 84 (12). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

The crystal structure and magnetic structure of the chromate series ACrO(3) (A = Ca, Sr, Pb) where Cr exhibits the unusual Cr4+ oxidation state have been studied by comprehensive diffraction experiments. In addition we present a detailed analysis of the infrared optical properties of polycrystalline CaCrO3 which is found to be metallic along all crystallographic directions. CaCrO3 forms the rare case of a three-dimensional antiferromagnetic and metallic transition-metal oxide in which the occurrence of magnetic ordering is closely coupled to a flattening of the lattice. The same C-type magnetic order is also found in the Sr material and again is coupled to a structural distortion associated with lattice flattening. However, in SrCrO3 only a part of the sample transforms into the antiferromagnetic distorted phase. In contrast to CaCrO3 and SrCrO3, PbCrO3 clearly is insulating with a significantly larger unit-cell volume and exhibits G-type magnetic order.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Komarek, A. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Moeller, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Isobe, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Drees, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ulbrich, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Azuma, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fernandez-Diaz, M. T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Senyshyn, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hoelzel, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Andre, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ueda, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grueninger, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Braden, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-489163
DOI: 10.1103/PhysRevB.84.125114
Journal or Publication Title: Phys. Rev. B
Volume: 84
Number: 12
Date: 2011
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9969
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SINGLE-CRYSTAL; PEROVSKITE; INSULATOR; CACRO3; CRO2; SRCRO3; PBCRO3; LATIO3; STATE; SPINMultiple languages
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/48916

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