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arXiv · 0909.3447

Antiferro--quadrupolar structures in UPd$_3$ inferred from x-ray resonant Bragg diffraction

Javier Fernandez-Rodriguez·Stephen W. Lovesey·Jesus A. Blanco
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Abstract

A systematic analysis of resonant x-ray Bragg diffraction data for UPd$_3$, with signal enhancement at the U M$_{IV}$ edge, including possible structural phase-transitions leads to a new determination of the space groups of the material in the phases between $T_0 = 7.8$ K and $T_{+1}$ = 6.9 K as P222$_1$ and between $T_{-1}$ = 6.7 K and $T_{2}$ = 4.4 K as space group P2$_1$. In addition, the quadrupolar order-parameters, $ $, inferred from diffraction data in the phase between $T_{-1}$ and $T_{2}$, are $ $ and $ $ at the (103) Bragg reflection, and $ $ at the (104) reflection.

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Javier Fernandez-Rodriguez, Stephen W. Lovesey, Jesus A. Blanco. 2010-01-11. Antiferro--quadrupolar structures in UPd$_3$ inferred from x-ray resonant Bragg diffraction. https://doi.org/10.1088/0953-8984%2F22%2F2%2F022202

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