Crystal-Field Excitations, Magnetic-Field-Induced Phase Transition and Neutron-Scattering Spectra in PrOs₄Sb₁₂

Field-induced quadrupolar order and possible pressure effect in

“…Recent experiments clearly indicate the consistency with the AFQ model, and rule out the possibility of predominant magnetic interaction. In this paper, we shall report a possible effect of uniaxial pressures on the AFQ phase, as a continuation of the previous studies [5][6][7].…”

“…Although the nature and the origin of the superconductivity is still controversial, the fieldinduced AFQ order has been understood well on the basis of the low-lying singlet-triplet crystal field levels. It has been shown that the effect of predominant AFQ interaction should appear in the following three aspects in the experimental observations [5][6][7]: (1) anisotropy of the phase diagram [4], (2) momentum dependence of neutron inelastic scattering spectra [8], (3) field direction dependence of the induced antiferromagnetism [3,9]. Recent experiments clearly indicate the consistency with the AFQ model, and rule out the possibility of predominant magnetic interaction.…”

Field-dependent mass enhancement inPr1−xLaxOs4Sb12Zwicknagl1, Thalmeier2, Fulde3 2009Phys. Rev. B11180View full textAdd to dashboardCite

“…The width of the exciton dispersion is controled by the effective quadrupolar coupling constant K Q or in dimensionless form by g Q = zβ ′ 2 K Q /∆. From the analysis of the AFQ phase diagram [12] and experimental zero-field dispersion [21] one may deduce g Q ≃ 0.3 in PrOs 4 Sb 12 . The minimum of the dispersion occurs at the bcc zone boundary wave vector Q = (1,0,0) (r.l.u.).…”

Inelastic Neutron Scattering Study of the Heavy Fermion Superconductor PrOs4Sb12

“…In the FIOP, the q dependence of the excitation spectrum is quite different : it is expected that the branches cross at Q=(1/2, 0, 0) (See Fig.2 of Ref. 20 ). This point will be examined in forthcoming INS studies.…”