Antiferromagnetism in MUO3 (M=Na,K,Rb) studied by neutron diffraction

S. Van Den Berghe; A. Leenaers; C. Ritter

doi:10.1016/j.jssc.2004.02.021

Antiferromagnetism in MUO₃ (M=Na,K,Rb) studied by neutron diffraction

S. Van Den Berghe, A. Leenaers, C. Ritter

Research output › peer-review

Abstract

Simultaneous refinements of X-ray and neutron powder diffraction patterns taken on the MUO₃ perovskite compounds with M=Na, K and Rb, were performed to reveal anisotropy in the temperature factors, mainly of oxygen. No anisotropic thermal motion was found. The magnetic ordering of the compounds has been investigated with low temperature neutron diffraction. It is found that all these compounds show G-type antiferromagnetic ordering with a similar, orthorhombic magnetic unit cell. The propagation vector could only be determined for the orthorombic NaUO₃ compound and was found to point in the z-direction. The refined magnetic moment for U⁵⁺ in these structures was found to be around 0.20(3) μ_B.

Original language	English
Pages (from-to)	2231-2236
Number of pages	6
Journal	Journal of Solid State Chemistry
Volume	177
Issue number	7
DOIs	https://doi.org/10.1016/j.jssc.2004.02.021
State	Published - Jul 2004

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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Cite this

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title = "Antiferromagnetism in MUO3 (M=Na,K,Rb) studied by neutron diffraction",

abstract = "Simultaneous refinements of X-ray and neutron powder diffraction patterns taken on the MUO3 perovskite compounds with M=Na, K and Rb, were performed to reveal anisotropy in the temperature factors, mainly of oxygen. No anisotropic thermal motion was found. The magnetic ordering of the compounds has been investigated with low temperature neutron diffraction. It is found that all these compounds show G-type antiferromagnetic ordering with a similar, orthorhombic magnetic unit cell. The propagation vector could only be determined for the orthorombic NaUO3 compound and was found to point in the z-direction. The refined magnetic moment for U5+ in these structures was found to be around 0.20(3) μB.",

keywords = "61.10.-i, 61.12.-q, 75.50.Ee, Alkali metal uranates, Magnetic structure, Neutron powder diffraction, Rietveld refinement, X-ray powder diffraction",

author = "{Van Den Berghe}, S. and A. Leenaers and C. Ritter",

year = "2004",

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doi = "10.1016/j.jssc.2004.02.021",

language = "English",

volume = "177",

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journal = "Journal of Solid State Chemistry",

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TY - JOUR

T1 - Antiferromagnetism in MUO3 (M=Na,K,Rb) studied by neutron diffraction

AU - Van Den Berghe, S.

AU - Leenaers, A.

AU - Ritter, C.

PY - 2004/7

Y1 - 2004/7

N2 - Simultaneous refinements of X-ray and neutron powder diffraction patterns taken on the MUO3 perovskite compounds with M=Na, K and Rb, were performed to reveal anisotropy in the temperature factors, mainly of oxygen. No anisotropic thermal motion was found. The magnetic ordering of the compounds has been investigated with low temperature neutron diffraction. It is found that all these compounds show G-type antiferromagnetic ordering with a similar, orthorhombic magnetic unit cell. The propagation vector could only be determined for the orthorombic NaUO3 compound and was found to point in the z-direction. The refined magnetic moment for U5+ in these structures was found to be around 0.20(3) μB.

AB - Simultaneous refinements of X-ray and neutron powder diffraction patterns taken on the MUO3 perovskite compounds with M=Na, K and Rb, were performed to reveal anisotropy in the temperature factors, mainly of oxygen. No anisotropic thermal motion was found. The magnetic ordering of the compounds has been investigated with low temperature neutron diffraction. It is found that all these compounds show G-type antiferromagnetic ordering with a similar, orthorhombic magnetic unit cell. The propagation vector could only be determined for the orthorombic NaUO3 compound and was found to point in the z-direction. The refined magnetic moment for U5+ in these structures was found to be around 0.20(3) μB.

KW - 61.10.-i

KW - 61.12.-q

KW - 75.50.Ee

KW - Alkali metal uranates

KW - Magnetic structure

KW - Neutron powder diffraction

KW - Rietveld refinement

KW - X-ray powder diffraction

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