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Synthesis and Characterization of the First 1:2 Ordered Perovskite Ruthenate

Published online by Cambridge University Press:  01 February 2011

Job Rijssenbeek ,
Sylvie Malo ,
Takashi Saito ,
Vincent Caignaert ,
Masaki Azuma ,
Mikio Takano  and
Kenneth R. Poeppelmeier
Job Rijssenbeek
Affiliation:
Department of Chemistry, Northwestern University, Evanston, IL 60208-3113
Sylvie Malo
Affiliation:
Laboratoire CRISMAT-ISMRA, Université de Caen, 6 Boulevard du Maréchal Juin, 14050 Caen, Cedex, France
Takashi Saito
Affiliation:
Institute for Chemical Research, Kyoto University, Uji, Kyoto-fu 611, Japan
Vincent Caignaert
Affiliation:
Laboratoire CRISMAT-ISMRA, Université de Caen, 6 Boulevard du Maréchal Juin, 14050 Caen, Cedex, France
Masaki Azuma
Affiliation:
Institute for Chemical Research, Kyoto University, Uji, Kyoto-fu 611, Japan
Mikio Takano
Affiliation:
Institute for Chemical Research, Kyoto University, Uji, Kyoto-fu 611, Japan
Kenneth R. Poeppelmeier
Affiliation:
Department of Chemistry, Northwestern University, Evanston, IL 60208-3113
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Abstract

Perovskite-like mixed metal ruthenates are of interest owing to their varied electronic and magnetic properties, which are heavily dependent on the ordering of the transition metals. We report the synthesis and structural characterization of the first 1:2 ordered perovskite ruthenate, Sr3CaRu2O9. The structure was determined from a combination of powder X-ray, electron and neutron diffraction data and is characterized by a 1:2 ordering of Ca2+ and Ru5+ over the sixcoordinate B-sites of the perovskite lattice. Sr3CaRu2O9 is the first example of this structure-type to include a majority metal with d electrons (Ru(V), d3). The relationship of this material to the K2NiF4-type Sr1.5Ca0.5RuO4 (i.e., Sr3CaRu2O8) highlights the dramatic effects of the ruthenium valence on the resultant structure. Remarkably, these two structures can be quantitatively interconverted by the appropriate choice of reaction temperature and atmosphere.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 718: Symposium D – Perovskite Materials , 2002 , D1.3
Copyright
Copyright © Materials Research Society 2002

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