Synthesis, structural and magnetic characterisation of the double perovskite A2MnMoO6 (A=Ba, Sr)

Autor:	Sergey A. Ivanov, Abul Kalam Azad, J. Eriksen, Peter Svedlindh, Roland Mathieu, Håkan Rundlöf, S.-G. Eriksson
Rok vydání:	2004
Předmět:	Valence (chemistry) Rietveld refinement Bond valence method Chemistry Mechanical Engineering Inorganic chemistry Neutron diffraction Metals and Alloys Space group Crystal structure Magnetization Crystallography Mechanics of Materials Materials Chemistry Perovskite (structure)
Zdroj:	Journal of Alloys and Compounds. 364:77-82
ISSN:	0925-8388
DOI:	10.1016/s0925-8388(03)00611-x
Popis:	A study of the crystallographic structure and magnetic properties of the double perovskites Ba2MnMoO6 and Sr2MnMoO6 in polycrystalline form has been carried out by means of neutron powder diffraction (NPD) and magnetization measurements. The Rietveld analysis of room temperature data shows that the Mn2+ and Mo6+ ions are B-site ordered, i.e. the structure is a NaCl-type ordered double perovskite. Ba2MnMoO6 crystallizes in the cubic space group Fm 3 m (a=8.1680(1)) and Sr2MnMoO6 crystallizes in the space group P42/n (a=7.9575(5), c=7.9583(9)). Bond valence sum (BVS) calculation revealed that these compounds have the valency pair of {Mn2+(3d5;t32ge2g), Mo6+(4d0)}. The magnetic measurements suggest that these compounds transform to an antiferromagnetic state below 10 K.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4638a1f42a111ccfee4beeb07af4d1b3 https://doi.org/10.1016/s0925-8388(03)00611-x Zobrazit plný text záznamu Full Text from ScienceDirect