Walker, HC;
McEwen, KA;
McMorrow, DF;
Wilkins, SB;
Wastin, F;
Colineau, E;
Fort, D;
(2006)
Determination of the antiferroquadrupolar order parameters in UPd3.
PHYS REV LETT
, 97
(13)
, Article 137203. 10.1103/PhysRevLett.97.137203.
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Abstract
By combining accurate heat capacity and x-ray resonant scattering results we have resolved the long standing question regarding the nature of the quadrupolar ordered phases in UPd3. The order parameter of the highest temperature quadrupolar phase has been uniquely determined to be antiphase Q(zx) in contrast to the previous conjecture of Q(x)(2)-y(2). The azimuthal dependence of the x-ray scattering intensity from the quadrupolar superlattice reflections indicates that the lower temperature phases are described by a superposition of order parameters. The heat capacity features associated with each of the phase transitions characterize their order, which imposes restrictions on the matrix elements of the quadrupolar operators.
| Type: | Article |
|---|---|
| Title: | Determination of the antiferroquadrupolar order parameters in UPd3 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.97.137203 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.97.137203 |
| Language: | English |
| Additional information: | © 2006 The American Physical Society |
| Keywords: | X-RAY SUSCEPTIBILITY, PHASE-TRANSITIONS, QUADRUPOLAR, CRYSTALS, SYSTEM, REFLECTIONS, SCATTERING, FIELD |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/9761 |
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