Magnetic order and crystalline electric field excitations of the quantum critical heavy-fermion ferromagnet 
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Shu, Jun; Adroja, D. T.; Hillier, A. D.; Zhang, Y. J.; Chen, Y. X.; Shen, Bin; Orlandi, Fabio; Walker, H. C.; Liu, Yi; Cao, Chao; Steglich, F.; Yuan, Huiqiu; Smidman, M.

doi:10.1103/physrevb.104.l140411

Cited by 14 publications

(5 citation statements)

References 45 publications

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“…Along the c axis in the Ti-rich region, λ starts with a small positive value at the pure Ti sample and turns negative while it still has a ferromagnetic ordering at the low temperature. Similar negative molecular field was also found in ferromagnetic hexagonal Ce compound, CeRh 6 Ge 4 , in both axes [65], and such negative λ can be resulted from the Kondo effect [41,42]. The residual magnetic susceptibility does not have a clear trend but remains small compared to the measured susceptibility values, and this is probably due to some impurity phases, quality of the samples, and different magnetic backgrounds when mounting the samples.…”

Section: Appendix B: Crystalline Electric Field Analysis Of Ceti1−xvx...supporting

confidence: 61%

Suppression of ferromagnetism governed by a critical lattice parameter in CeTiGe$\_3$ with hydrostatic pressure or V substitution

Jin,

Cai,

Coles

et al. 2022

Preprint

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We combine structural and magnetic measurements to compare the different magnetic phase diagrams between the pressure and substitution studies in CeTiGe3. We report on the structural, magnetic, and electrical transport properties of single crystals of CeTi1−xVxGe3 (x = 0, 0.1, 0.2, 0.3, 0.4, 0.9, and 1), and of polycrystalline samples (x = 0.5, 0.6, 0.7, 0.8), as well as structural properties of CeTiGe3 under pressure up to 9 GPa. The ferromagnetic ordering in CeTiGe3 is suppressed with V doping in CeTi1−xVxGe3, and suggests a possible ferromagnetic quantum critical point near x = 0.45. We perform a detailed crystalline electric field (CEF) analysis, and the magnetic susceptibility data in pure CeTiGe3 and CeVGe3 can be well explained by the CEF model. The proposed CEF energy levels suggest that there is a gradual change of the ground state from |±5/2 in CeTiGe3 to |±1/2 in CeVGe3, and a suppression of CEF splitting energies near the quantum critical region. When hydrostatic pressure is used instead of chemical substitution, the quantum critical point is avoided by the appearance of magnetic phases above around 4.1 GPa. In the substitution study, the ferromagnetic and antiferromagnetic regions are well separated, whereas they touch in the pressure study. We observe a different trend in the temperature dependence of the resistivity maximum in both studies, suggesting that the CEF splitting energy is suppressed by V substitution but enhanced by pressure. We also observe different responses in lattice constants between the two studies, highlighting the fact that substitution effects cannot be reduced to chemical pressure effects only. Nevertheless, when the magnetic phase diagrams of both hydrostatic pressure and substitution are compared, we find a common critical lattice constant c = 5.78 A where the ferromagnetic ordering is suppressed in both studies.

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Section: Appendix B: Crystalline Electric Field Analysis Of Ceti1−xvx...supporting

confidence: 61%

Suppression of ferromagnetism governed by a critical lattice parameter in CeTiGe$\_3$ with hydrostatic pressure or V substitution

Jin,

Cai,

Coles

et al. 2022

Preprint

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“…A localized nature of the 4f elec-trons in CeRh 6 Ge 4 was revealed in the subsequent study of quantum oscillations and density functional theory calculations [17]. Meanwhile, angle resolved photoemission spectroscopy [18], ultrafast optical spectroscopy [19] and inelastic neutron scattering [20] provide evidence for anisotropic hybridization between the conduction and 4f electrons in CeRh 6 Ge 4 .…”

Section: Introductionmentioning

confidence: 95%

Suppression of ferromagnetism and influence of disorder in silicon-substituted CeRh6Ge4

Zhang¹,

Nie²,

Li³

et al. 2022

Preprint

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We report a study of isoelectronic chemical substitution in the recently discovered quantum critical ferromagnet CeRh6Ge4. Upon silicon-doping, the ferromagnetic ordering temperature of CeRh6(Ge1−xSix)4 is continuously suppressed, and no transition is observed beyond xc≈0.125. Non-Fermi liquid behavior with C/T ∝log(T * /T ) is observed close to xc, indicating the existence of strong quantum fluctuations, while the T -linear behavior observed upon pressurizing the parent compound is absent in the resistivity, which appears to be a consequence of the disorder induced by silicon doping. Our findings provide evidence for the role played by disorder on the unusual ferromagnetic quantum criticality in CeRh6Ge4, and provides further evidence for understanding the origin of this behavior.

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“…Intermetallic compounds containing rare-earth metals have lots of exotic properties due to strong electron-electron correlations and interactions between delocalized conduction electrons and localized 4 f electrons [1], such as superconductivity [2][3][4], non-fermi liquid behaviors [5][6][7], Kondo effects [8][9][10][11][12], magnetic orders [13,14], quantum critical behaviors [15,16] and so on.…”

Section: Introductionmentioning

confidence: 99%

Strong magnetic anisotropy in PrRu₂Ga₈ and PrCo₂Al₈ single crystals

Xiao

Wang

Yan

et al. 2023

J. Phys.: Condens. Matter

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Single crystals of LnRu2Ga8 and LnCo2Al8 (Ln = La and Pr) were grown using a Ga/Al self-flux method. An orthorhombic CaCo2Al8-type structure with space group Pbam (No.55) of them was identified by XRD. LaRu2Ga8 and LaCo2Al8 are Pauli paramagnetic down to 2 K, while PrRu2Ga8 and PrCo2Al8 show antiferromagnetic order at 2.5 and 5 K, respectively. Strong magnetic anisotropy in PrRu&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;Ga&amp;lt;sub&amp;gt;8&amp;lt;/sub&amp;gt; and PrCo&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;Al&amp;lt;sub&amp;gt;8&amp;lt;/sub&amp;gt; single crystals was found by an anisotropic magnetic measurement. The field-induced ferromagnetic state was observed in both PrRu2Ga8 and PrCo2Al8 for H||c. However, in the case of H⊥c, the antiferromagnetic state is robust. The strong magnetic anisotropy in PrRu2Ga8 and PrCo2Al8 is due to their anisotropic magnetic interactions that ferromagnetic interactions are dominant in the case of H||c while antiferromagnetic interactions for H⊥c.

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Magnetic order and crystalline electric field excitations of the quantum critical heavy-fermion ferromagnet CeRh6Ge4

Cited by 14 publications

References 45 publications

Suppression of ferromagnetism governed by a critical lattice parameter in CeTiGe$\_3$ with hydrostatic pressure or V substitution

Suppression of ferromagnetism governed by a critical lattice parameter in CeTiGe$\_3$ with hydrostatic pressure or V substitution

Suppression of ferromagnetism and influence of disorder in silicon-substituted CeRh6Ge4

Strong magnetic anisotropy in PrRu₂Ga₈ and PrCo₂Al₈ single crystals

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Magnetic order and crystalline electric field excitations of the quantum critical heavy-fermion ferromagnet CeRh6Ge4

Cited by 14 publications

References 45 publications

Suppression of ferromagnetism governed by a critical lattice parameter in CeTiGe$\_3$ with hydrostatic pressure or V substitution

Suppression of ferromagnetism governed by a critical lattice parameter in CeTiGe$\_3$ with hydrostatic pressure or V substitution

Suppression of ferromagnetism and influence of disorder in silicon-substituted CeRh6Ge4

Strong magnetic anisotropy in PrRu2Ga8 and PrCo2Al8 single crystals

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Product

Resources

About

Strong magnetic anisotropy in PrRu₂Ga₈ and PrCo₂Al₈ single crystals