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Antiferro-quadrupolar structures in UPd3 inferred from x-ray resonant Bragg diffraction

DOI: 10.1088/0953-8984/22/2/022202 DOI Help

Authors: Javier Fernandez-rodriguez (ESRF) , Jesus A. Blanco (University of Oviedo) , Stephen W. Lovesey (Diamond Light Source Ltd)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Physics: Condensed Matter , VOL 22 (2)

State: Published (Approved)
Published: January 2010

Abstract: A systematic analysis of resonant x-ray Bragg diffraction data for UPd3, 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 P2(1). In addition, the quadrupolar order parameters, < Q(ab)>, inferred from diffraction data for the phase between T-1 and T-2, are < Q(xz)> and < Q(yz)> at the ( 103) Bragg reflection and < Q(xy)> at the ( 104) reflection.

Subject Areas: Physics

Instruments: NONE-No attached Diamond beamline

Added On: 22/01/2010 10:13

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