Octupole Ordering Model for the Phase IV of CexLa1-xB6

Abstract

An octupole ordering model is studied by the mean field theory, and its relevance to the phase IV of CexLa1-xB6 is discussed. The observed lattice distortion along the [111] direction is interpreted in terms of the Γ_{5g}-type ferro-quadrupole moment induced by an antiferro-octupole ordered state with Γ_{5u} symmetry. The octupole model also accounts for the cusp in the magnetization as in the Néel transition, and the softening of the elastic constant C_{44} below the ordering temperature. However, the internal magnetic field due to the octupole moment is smaller than the observed one by an order of magnitude. Also discussed is the possibility of a pressure induced antiferromagnetic moment in the octupole-ordered state.

9 pages, 10 figures, to be published in J. Phys. Soc. Jpn. 73 No.1 (2004)

References in corpus (5)

• Triple-q octupolar ordering in NpO_2
• Octupole Moment as a Hidden Order Parameter in Orbitally Degenerate f-Electron Systems
• Non-Collinear Magnetism due to Orbital Degeneracy and Multipolar Interactions
• Lattice Distortion and Octupole Ordering Model in CexLa1-xB6
• Octupolar ordering of Gamma8 ions in magnetic field

Cited by in corpus (31)

• Classification of atomic-scale multipoles under crystallographic point groups and application to linear response tensors
• Orbital ordering phenomena in $d$- and $f$-electron systems
• Description of Multipole in f-Electron Systems
• Group theory and octupolar order in URu2Si2
• Multipolar phases and magnetically hidden order: Review of the heavy-fermion compound Ce(1-x)La(x)B6
• Detection of Neutron Scattering from Phase IV of Ce0.7La0.3B6: A Confirmation of the Octupole Order
• Microscopic theory of multipole ordering in NpO2
• Evidence for Octupole Order in Ce${}_{0.7}$La${}_{0.3}$B${}_6$ from Resonant X-ray Scattering
• Magnetic-Field-Induced 4f-Octupole in CeB6 Probed by Resonant X-ray Diffraction
• Invariant Form of Hyperfine Interaction with Multipolar Moments - Observation of Octupolar Moments in NpO${}_2$ and CeB${}_6$ by NMR -
• A theory of the electric quadrupole contribution to resonant x-ray scattering: Application to multipole ordering phases in Ce_{1-x}La_{x}B_{6}
• Multipole ordering in f-electron systems on the basis of a j-j coupling scheme
• Influence of lattice structure on multipole interactions in ${\Gamma }_3$ non-Kramers doublet systems
• Derivation of RKKY Interaction between Multipole Moments in CeB${}_6$ by the Effective Wannier Model based on the Bandstructure Calculation
• Elastic Properties and Magnetic Phase Diagrams of Dense Kondo Compound Ce0.75La0.25B6
• Triple-$\mathcal{Q}$ partial magnetic orders induced by quadrupolar interactions: Triforce order scenario for UNi${}_4$B
• Multipolar ordering from dynamical mean field theory with application to CeB6
• Multipole Ordering and Fluctuations in f-Electron Systems
• Multipole ordering in f-electron systems
• Diffraction from Ordered States of Higher Multipoles
• Toward Identification of Order Parameters in Skutterudites - a Wonderland of Strong Correlation Physics -
• Atomic displacements and lattice distortion in the magnetic-field-induced charge ordered state of SmRu${}_4$P${}_{12}$
• Current-induced quasiparticle magnetic multipole moments
• Multipole as $f$-Electron Spin-Charge Density in Filled Skutterudites
• Wavenumber Dependence of Multipolar Interactions in the Anderson Lattice
• Multipolar spin liquid in an exactly solvable model for $j_{\mathrm{eff}}=\frac{3}{2}$ moments
• Multipole correlations in low-dimensional f-electron systems
• Importance of anisotropic interactions for hard-axis/plane ordering of Ce-based ferromagnets
• Octupolar edge state in an $e_g$ orbital system on a square lattice
• Flat Surface State with Octupole Moment in an $e_g$ Orbital System on a Simple Cubic Lattice
• RKKY interactions of CeB6 based on effective Wannier model