Enhancement of band magnetism and features of the magnetically ordered state in the CeB6 compound with strong electron correlations

Sluchanko, N. E.; Bogach, A. V.; Ġlushkov, V. V.; Demishev, S. V.; Ivanov, V. Yu.; Ignatov, M.I.; Kuznetsov, A. V.; Samarin, N. A.; Semeno, A. V.; Shitsevalova, N. Yu.

doi:10.1134/s106377610701013x

Cited by 45 publications

(48 citation statements)

References 47 publications

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“…Moreover, hysteresis is also detected on ρ H (ϕ) curves at T < T N 2 , measured for the sample rotated in opposite directions. Note that similar meander-type ρ H (ϕ) dependences were previously registered both in the AF state of CeB 6 [9] and in the low temperature micromagnetic phase of FeSi (see the discussion in [9]). The appearance of these singularities of the Hall resistance in combination with the drastic discrepancy of the ρ H (ϕ) data near 180…”

Section: Methodssupporting

confidence: 49%

Hall Effect in GdB_{6}

et al. 2014

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The Hall eect of GdB6 has been studied on high quality single crystals in the temperature range 2150 K and in magnetic eld of 1 T. The obtained data allow to detect anomalies in the antiferromagnetic (AF) phase including (i) a drastic enhancement of negative Hall coecient below TN1 ≈ 15.5 K and (ii) the appearance of an anomalous Hall eect at TN2 ≈ 4.7 K. Possible scenarios of the AF ground state formation are discussed.

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Section: Methodssupporting

confidence: 49%

Hall Effect in GdB_{6}

et al. 2014

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“…1a) [12]) and therefore ESR is entirely settled in the AFQ phase diagram area. In this case the theoretical model [5,6] should be applicable to the experimental data and it is reasonable to make their comparative analysis.…”

Section: Resultsmentioning

confidence: 99%

Angular Dependences of ESR Parameters in Antiferroquadrupolar Phase of CeB₆

et al. 2017

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Angular dependences of ESR line parameters (g-factor and linewidth ∆H) were experimentally explored in the antiferroquadrupolar phase of heavy fermion system CeB6 at T = 1.8 K. The data were obtained in two experimental geometries with different mutual directions of the wavevector k and the external magnetic field H at frequency of f = 60 GHz. A g-factor anisotropy was found: while g-factors for [110] and [111] directions are close to each other (g ≈ 1.6), it is considerably higher (g ≈ 1.75) for [100]. The obtained angular dependence g(Θ) was compared with the theoretically predicted g-factor behavior for the Γ8 state of Ce 3+ ion in antiferroquadrupolar phase of CeB6. It turns out that the experimental g-factor is considerably smaller at all angles than the theoretically calculated limits (2 < g < 2.2) and, moreover, it has a different symmetry. This result together with the strong linewidth anisotropy ∆H(Θ) demonstrates that for the relevant description of experimental data the theoretical model should take into account also the interaction of Ce 3+ ion with itinerant 5d electrons.

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“…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].…”

Section: Introductionmentioning

confidence: 99%

Doping-induced redistribution of magnetic spectral weight in the substituted hexaborides Ce1−xLaxB6 and
Nikitin
¹
,
Portnichenko
²
,
Dukhnenko
³

et al. 2018
Phys. Rev. B
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3
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We investigate the doping-induced changes in the electronic structure of CeB 6 on a series of substituted Ce 1−x R x B 6 samples (R = La, Nd) using diffuse neutron scattering. We observe a redistribution of magnetic spectral weight across the Brillouin zone, which we associate with the changes in the Fermi-surface nesting properties related to the modified charge carrier concentration. In particular, a strong diffuse peak at the corner of the Brillouin zone (R point), which coincides with the propagation vector of the elusive antiferroquadrupolar (AFQ) order in CeB 6 , is rapidly suppressed by both La and Nd doping, like the AFQ order itself. The corresponding spectral weight is transferred to the X (00 1 2 ) point, ultimately stabilizing a long-range AFM order at this wave vector at the Nd-rich side of the phase diagram. At an intermediate Nd concentration, a broad diffuse peak with multiple local maxima of intensity is observed around the X point, evidencing itinerant frustration that gives rise to multiple ordered phases for which Ce 1−x Nd x B 6 is known. On the La-rich side of the phase diagram, however, dilution of the magnetic moments prevents the formation of a similar (00 1 2 )-type order despite the presence of nesting. Our results demonstrate how diffuse neutron scattering can be used to probe the nesting vectors in complex f-electron systems directly, without reference to the single-particle band structure, and emphasize the role of Fermi surface geometry in stabilizing magnetic order in rare-earth hexaborides.

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Enhancement of band magnetism and features of the magnetically ordered state in the CeB6 compound with strong electron correlations

Cited by 45 publications

References 47 publications

Hall Effect in GdB_{6}

Hall Effect in GdB_{6}

Angular Dependences of ESR Parameters in Antiferroquadrupolar Phase of CeB₆

Doping-induced redistribution of magnetic spectral weight in the substituted hexaborides Ce1−xLaxB6 and
Nikitin
¹
,
Portnichenko
²
,
Dukhnenko
³

et al. 2018
Phys. Rev. B
Self Cite
12
3
16
0
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Enhancement of band magnetism and features of the magnetically ordered state in the CeB6 compound with strong electron correlations

Cited by 45 publications

References 47 publications

Hall Effect in GdB_{6}

Hall Effect in GdB_{6}

Angular Dependences of ESR Parameters in Antiferroquadrupolar Phase of CeB6

Doping-induced redistribution of magnetic spectral weight in the substituted hexaborides Ce1−xLaxB6 and Nikitin1, Portnichenko2, Dukhnenko3 et al. 2018Phys. Rev. BSelf Cite123160View full textAdd to dashboardCite

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Angular Dependences of ESR Parameters in Antiferroquadrupolar Phase of CeB₆

Doping-induced redistribution of magnetic spectral weight in the substituted hexaborides Ce1−xLaxB6 and
Nikitin
¹
,
Portnichenko
²
,
Dukhnenko
³

et al. 2018
Phys. Rev. B
Self Cite
12
3
16
0
View full text Add to dashboard Cite