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Article Dans Une Revue Journal of Solid State Chemistry Année : 2022

Structural and magnetic properties of churchite-type REPO4 center dot 2H(2)O materials

Résumé

The structural and magnetic properties of churchite-type REPO4·2H2O (RE ​= ​Gd to Lu) materials (low-temperature polymorph of the rare-earth phosphate family) are reported. The materials were synthesized at low temperatures (4 ​°C) using a precipitation method and the long-range and local structures were determined using powder XRD and XANES. The churchite materials crystallize in the monoclinic system (Space group – C2/c) and adopt a 2D layered structure with water occupying the interlayer regions. The churchite materials were found to transform to the xenotime structure at 300 ​°C. DC magnetization experiments reveal the absence of long-range magnetic ordering between 300 and 1.8 ​K. The effective magnetic moments (μeff) are similar to those of the free RE (RE ​= ​Gd, Tb, Dy, Ho, Er) ions.
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Dates et versions

hal-03763316 , version 1 (20-10-2022)

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M. Rafiuddin, S. Guo, G. Donato, A. Grosvenor, N. Dacheux, et al.. Structural and magnetic properties of churchite-type REPO4 center dot 2H(2)O materials. Journal of Solid State Chemistry, 2022, 312, pp.123261. ⟨10.1016/j.jssc.2022.123261⟩. ⟨hal-03763316⟩
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