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

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

2009-09-18

arxiv.org/abs/0909.3447v3

J. Phys.: Condens. Matter 22 No 2 (2010) 022202

Physics

Condensed Matter

Strongly Correlated Electrons

13 pages, 4 figures

Scientific paper

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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