Magnetic phase diagram of CeB6

Doping-induced redistribution of magnetic spectral weight in the substituted hexaborides Ce1−xLaxB6 and Nikitin1, Portnichenko2, Dukhnenko3 et al. 2018Phys. Rev. B123160View full textAdd to dashboardCite

“…A model example of intriguing heavy-fermion physics is CeB 6 , which exhibits a very complex magnetic phase diagram and a rich spectrum of excitations, indicating a delicate balance between different microscopic interactions despite very simple crystal and electronic structures [29][30][31]. Zero-field phase diagram of CeB 6 consists of a complex double-q antiferromagnetic (AFM) phase below T N = 2.3 K [32] and the so-called "hidden order" phase II between T N and T Q = 3.2 K, which results from a G-type antiferroquadrupolar (AFQ) ordering of the x y , yz and z x quadrupolar moments of Ce 3+ ions [33][34][35][36][37].…”

Anomalous elastic softening ofSmRu4P12under high pressure

“…T N is obscure at lower magnetic fields; however, it is distinctly visible in several measurements like thermal expansion [6] even in a zero magnetic field. With increasing magnetic field, T MI increases while T N decreases, resembling CeB 6 , which has an antiferroquadrupolar (AFQ) ordering and a subsequent magnetic ordering [7]. For this reason, SmRu 4 P 12 was initially thought to be an AFQ system; however, increasing doubt is being thrown on this view, stimulating interest in the order parameters (OPs).…”

“…First, almost no elastic softening is observed above T MI [9] and the elastic anomaly at T MI is not very large, unlike a typical AFQ ordering such as in CeB 6 [11] and DyB 2 C 2 [12]. Second, by application of magnetic fields, the specific heat anomaly of AFQ ordering in CeB 6 is enhanced, while that at T MI in SmRu 4 P 12 changes only slighy; meanwhile, the anomaly at T N in CeB 6 is weakened, whereas it is enhanced in SmRu 4 P 12 [7,13]. Recently, the possibility of octupole ordering was proposed for the MI transition [14].…”

Kondo Physics in a Rare Earth Ion with Well Localized4fElectrons

“…Raman experiments as well as detailed theoretical studies do indicate that one expects strong quadrupolar influence in the properties of NdB 6 [12,25,26]. Note that for La 1Àx Ce x B 6 strong Kondo features exist for all Ce concentrations and for large x antiferroquadrupolar order has been found [27].…”