UPd3 exhibits four phase transitions between 8 K and 4 K which have been attributed to
a succession of antiferroquadrupolar ordered structures of the uranium 5f2 electrons. These structures have been studied by resonant X-ray scattering techniques.We present new measurements of the azimuthal dependence of the superlattice intensities from which we have deduced the order parameter in the phase immediately below T0 = 7:6 K to be Qzx. We also report studies of dhcp NpPd3 with results for the magnetic susceptibility, heat capacity and electrical resistivity. Two phase transitions have been observed at 30 K and 10 K. The evolution of the quadrupolar phases in UPd3 has been determined in samples of (U1¡xNpx)Pd3.
MCEWEN K.A.;
WALKER H.C.;
BOULET Pascal;
COLINEAU Eric;
WASTIN Franck;
WILKINS S.B.;
2006-11-10
PHYSICAL SOCIETY JAPAN
JRC31293
https://publications.jrc.ec.europa.eu/repository/handle/JRC31293,
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