Title |
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High-temperature X-ray diffraction measurements of fluorite-related rare earth antimonates Ln(3)SbO(7) (Ln = Nd, Tb) and their magnetic properties
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Creator |
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Accessrights |
open access |
Rights |
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en
(C) 2014 Elsevier Inc. All rights reserved.
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Subject |
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Other
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Magnetic properties
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Other
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Rare earth
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Other
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Oxides
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Other
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Specific heat
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Other
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Defect-fluorite
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NDC
430
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Description |
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Abstract
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Ternary rare-earth antimonates Ln(3)SbO(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; Ccmm for Ln=Sm-Dy), in which Ln(3+) ions occupy two different crystallographic sites (the 8-coordinated and 7-coordinated). For Ln=Nd, two phases with the Cmcm and Cam space groups coexist at room temperature. When the temperature was increased, the Nd3SbO7 compound transformed into a single phase with the space group Cmcm. Through magnetic susceptibility measurements, an antiferromagnetic transition was observed at 3.0 K (Ln=Nd) and 7.8 K (Ln=Tb). Analysis of the magnetic specific heat for Tb3SbO7 indicates that the 8-coordinated Tb ions magnetically orders at 7.8 K, and with furthermore decreasing temperature, the 7-coordinated Tb ions shows antiferromagnetic ordering at 3.0 K.
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Publisher |
en
Elsevier
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Date |
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Language |
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Resource Type |
journal article |
Version Type |
AM |
Identifier |
HDL
http://hdl.handle.net/2115/56856
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Relation |
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isVersionOf
DOI
https://doi.org/10.1016/j.jssc.2014.05.005
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Journal |
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Journal of Solid State Chemistry
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Volume Number217
Page Start16
Page End21
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File |
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Oaidate |
2023-07-26 |