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Synthesis, Crystal Structure, and Properties of the Ordered Double Perovskite Sr2CoOsO6
Sr2CoOsO6, a new osmium based ordered semiconductor double perovskite was prepared by solid state synthesis from the respective binary oxides. Room temperature PXRD analysis shows the compound to be tetragonal [I4/m; a = 5.5503(1) Å and c = 7.9320(1) Å], whereas low temperature synchrotron data refi...
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Published in: | Zeitschrift für anorganische und allgemeine Chemie (1950) 2013-11, Vol.639 (14), p.2421-2425 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | Sr2CoOsO6, a new osmium based ordered semiconductor double perovskite was prepared by solid state synthesis from the respective binary oxides. Room temperature PXRD analysis shows the compound to be tetragonal [I4/m; a = 5.5503(1) Å and c = 7.9320(1) Å], whereas low temperature synchrotron data refinement has revealed a second monoclinic polymorph [I2/m; a = 5.4969(2) Å, b = 5.4979(2) Å, c = 8.0090(1) Å and γ = 90.527(1)°] with a fully ordered rocksalt arrangement of cobalt and osmium atoms over the perovskite B‐sites. Heat capacity and magnetic measurements indicate that Sr2CoOsO6 shows antiferromagnetic ordering below TN = 108 K followed by a second magnetic transition at T2 = 65 K. It was shown that the change from the tetragonal to the monoclinic phase occurs at TN. |
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ISSN: | 0044-2313 1521-3749 |
DOI: | 10.1002/zaac.201300429 |