Magnetic properties of orthorhombic fluorite-related oxides Ln{sub 3}SbO{sub 7} (Ln=rare earths)

Journal Article · Wed Jul 15 00:00:00 EDT 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.04.015· OSTI ID:21370470

Hinatsu, Yukio ^[1]; Ebisawa, Haruka; Doi, Yoshihiro ^[1]

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1. Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810 (Japan)

Ternary rare earth antimonates Ln{sub 3}SbO{sub 7} (Ln=rare earths) were prepared and their structures were determined by X-ray diffraction measurements. They crystallize in an orthorhombic superstructure of cubic fluorite (space group Cmcm for Ln=La, Pr, Nd; C222{sub 1} for Ln=Nd-Lu), in which Ln{sup 3+} ions occupy two different crystallographic sites (the 8-coordinated and 7-coordinated sites). Their magnetic properties were characterized by magnetic susceptibility and specific heat measurements from 1.8 to 400 K. The Ln{sub 3}SbO{sub 7} (Ln=Nd, Gd-Ho) compounds show an antiferromagnetic transition at 2.2-3.2 K. Sm{sub 3}SbO{sub 7} and Eu{sub 3}SbO{sub 7} show van Vleck paramagnetism. Measurements of the specific heat down to 0.4 K for Gd{sub 3}SbO{sub 7} and the analysis of the magnetic specific heat indicate that the antiferromagnetic ordering of the 8-coordinated Gd ions occur at 2.6 K, and the 7-coordinated Gd ions order at a furthermore low temperature. - Graphical Abstract: Ternary rare earth antimonates Ln{sub 3}SbO{sub 7} (Ln=rare earths) crystallize in an orthorhombic superstructure of cubic fluorite (space group Cmcm for Ln=La, Pr, Nd; C222{sub 1} for Ln=Nd-Lu), in which Ln{sup 3+} ions occupy two different crystallographic sites (the 8-coordinated and 7-coordinated sites). Any of these compounds Ln{sub 3}SbO{sub 7} (Ln=Nd, Gd-Ho) shows an antiferromagnetic transition at 2.2-3.2 K.

• OSTI ID: 21370470
• Journal Information: Journal of Solid State Chemistry, Vol. 182, Issue 7; Other Information: DOI: 10.1016/j.jssc.2009.04.015; PII: S0022-4596(09)00178-9; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETISM
ANTIMONATES
CRYSTALLOGRAPHY
CUBIC LATTICES
GADOLINIUM IONS
MAGNETIC SPECIFIC HEAT
MAGNETIC SUSCEPTIBILITY
ORTHORHOMBIC LATTICES
OXIDES
PARAMAGNETISM
RARE EARTH COMPOUNDS
SPACE GROUPS
TEMPERATURE RANGE 0000-0013 K
X-RAY DIFFRACTION
ANTIMONY COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
IONS
MAGNETIC PROPERTIES
MAGNETISM
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCATTERING
SPECIFIC HEAT
SYMMETRY GROUPS
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES