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Preparation, Crystal and Magnetic Structure of the Double Perovskites Ba2CoBO6 (B = Mo, W)

✍ Scribed by María J. Martínez-Lope; José A. Alonso; María T. Casais; María T. Fernández-Díaz

Publisher: John Wiley and Sons
Year: 2002
Tongue: English
Weight: 215 KB
Volume: 2002
Category: Article
ISSN: 1434-1948
DOI: 10.1002/1099-0682(200209)2002:9<2463::aid-ejic2463>3.0.co;2-j

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✦ Synopsis

Ba 2 CoBO 6 (B = Mo, W) perovskites have been prepared in polycrystalline form by thermal treatment, in air, of previously decomposed citrate precursors. These materials have been characterized by X-ray (XRD) and neutron powder diffraction (NPD) data and magnetization measurements. At room temperature, the crystal structure is cubic, space group Fm3 ¯m, with a = 8.08623(3) and 8.10799(3) A ˚for the Mo and W compounds, respectively. The crystal contains alternating CoO 6 and Mo(W)O 6 octahedra, with an almost negligible anti-site disordering. The low temperature antiferromagnetic ordering has been followed from sequential neutron diffraction data.

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