Determination of the Antiferroquadrupolar Order Parameters in UPd3

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 UPd_3. 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.

4 pages, 5 figures

References in corpus (8)

• Multiple Superconducting Phases in New Heavy Fermion Superconductor PrOs4Sb12
• Triple-q octupolar ordering in NpO_2
• Anomalous heavy-fermion and ordered states in the filled skutterudite PrFe4P12
• Direct observation of orbital ordering in La${}_{0.5}$Sr${}_{1.5}$MnO${}_4$ using soft x-ray diffraction
• Soft x-ray resonant diffraction study of magnetic and orbital correlations in a manganite near half-doping
• Resonant X-ray Scattering Study of Magnetic and Electric-quadrupole Order in U${}_{0.75}$Np${}_{0.25}$O${}_2$
• Observation of the antiferroquadrupolar order in DyB2C2 by resonant x-ray scattering
• Ultrasound Investigations of Orbital Quadrupolar Ordering in UPd_3

Cited by in corpus (18)

• Colloquium: Hidden Order, Superconductivity, and Magnetism -- The Unsolved Case of URu2Si2
• Puzzle of the gamma-alpha and other phase transitions in cerium
• Waves in the unseen : theory of spin excitations in a quantum spin nematic
• First-principles theory of magnetic multipoles in condensed matter systems
• Materials Design for New Superconductors
• Synchrotron Radiation Techniques and their Application to Actinide Materials
• Determination of magnetic order of the rare-earth ions in multiferroic TbMn2O5
• Large positive correlation between the effective electron mass and the multipolar fluctuation in the heavy-fermion metal Ce${}_{1-x}$La${}_x$B${}_6$
• Anisotropic Multipolar Exchange Interactions in Systems with Strong Spin-Orbit Coupling
• Magnetic and electrical properties of dhcp NpPd3 and U(1-x)Np(x)Pd3
• Observation of a Critical Charge Mode in a Strange Metal
• Mean-field Study of Antiferromagnetic and Antiferroquadrupolar Orderings in Tetragonal CeCoSi
• A Mean Field Model for the Quadrupolar Phases of UPd${}_3$
• Antiferro--quadrupolar structures in UPd${}_3$ inferred from x-ray resonant Bragg diffraction
• Canted antiferromagnetism in a spin-orbit coupled $S_{\text{eff}}=3/2$ triangular-lattice magnet DyAuGe
• Effect of core-valence intra-atomic quadrupolar interaction in resonant x-ray scattering at the Dy M${}_{4,5}$ edges in DyB${}_2$C${}_2$
• Magnetic and electronic phases of U${}_2$Rh${}_3$Si${}_5$
• The Linear and Non-linear Magnetic Response of a Tri-Uranium Single Molecule Magnet