High pressure electrical resistivity of CeCuAl<sub>3</sub>

Kawamura, Yukihiro; Nishioka, Takashi; Kato, Hidemi; Matsumura, Masatoshi; Matsubayashi, Kazuyuki; Uwatoko, Yoshiya

doi:10.1088/1742-6596/200/1/012082

Cited by 9 publications

(3 citation statements)

References 11 publications

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“…A similar influence of the CEF levels on the electrical resistivity can be observed in many other cerium based compounds. [29][30][31][32][33][34][35][36][37][38][39][40][41] The two anomalies we observe are expected to merge under pressure with the increase of the Kondo effect 42 and indeed, at a qualitative level, this is observed in Fig. 1(b) as the pressure is increased.…”

Section: Resultssupporting

confidence: 53%

Electrical resistivity study of CeZn11: Magnetic field and pressure phase diagram up to 5 GPa

et al. 2013

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Thorough resistivity measurements on single crystals of CeZn11 under pressure p and magnetic field H are presented. At ambient pressure, CeZn11 orders antiferromagnetically at TN=2 K. The pressure dependence of the resistivity reveals an increase of the Kondo effect. We determine the pressure evolution of the magnetic exchange interaction between conduction and localized 4f electrons. It qualitatively reproduces the pressure evolution of the magnetic ordering temperature TO1 (with TO1=TN at ambient pressure). In addition to TO1, a new anomaly TO2appears under pressure. Both anomalies are found to increase with applied pressure up to 4.9 GPa, indicating that CeZn11 is far from a pressure induced quantum critical point. Complex T-H phase diagrams are obtained under pressure which reveal the instability of the ground state in this compound. Keywords Physics and Astronomy Disciplines Condensed Matter Physics CommentsThis article is from Physical Review B 88 (2013) Thorough resistivity measurements on single crystals of CeZn 11 under pressure p and magnetic field H are presented. At ambient pressure, CeZn 11 orders antiferromagnetically at T N = 2 K. The pressure dependence of the resistivity reveals an increase of the Kondo effect. We determine the pressure evolution of the magnetic exchange interaction between conduction and localized 4f electrons. It qualitatively reproduces the pressure evolution of the magnetic ordering temperature T O 1 (with T O 1 = T N at ambient pressure). In addition to T O 1 , a new anomaly T O 2 appears under pressure. Both anomalies are found to increase with applied pressure up to 4.9 GPa, indicating that CeZn 11 is far from a pressure induced quantum critical point. Complex T -H phase diagrams are obtained under pressure which reveal the instability of the ground state in this compound.

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Section: Resultssupporting

confidence: 53%

Electrical resistivity study of CeZn11: Magnetic field and pressure phase diagram up to 5 GPa

et al. 2013

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“…Both compounds show a heavy fermion ground state, demonstrated by an electronic contribution to the specific heat of γ = 227 mJ/molK 2 as well as a large prefactor of the low-temperature electric resistivity of A = 5.0 µΩcm/K 2 in CeAuAl 3 [32] and γ = 140 mJ/molK 2 in CeCuAl 3 . Under pressure, T N rises up to 60 kbar in CeCuAl 3 and suddenly vanishes at 80 kbar [18,30], pointing towards the existence of a quantum critical point (QCP). Recently, a phonon -crystal field quasibound state has been found in CeCuAl 3 [2], which is not present in CeAuAl 3 [1].…”

Section: Introductionmentioning

confidence: 99%

Single crystal growth of CeTAl3 (T = Cu, Ag, Au, Pd and Pt)

Senyshyn

Regnat

Duvinage

et al. 2016

Journal of Alloys and Compounds

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We report single crystal growth of the series of CeT Al 3 compounds with T = Cu, Ag, Au, Pd and Pt by means of optical float zoning. High crystalline quality was confirmed in a thorough characterization process. With the exception of CeAgAl 3 , all compounds crystallize in the non-centrosymmetric tetragonal BaNiSn 3 structure (space group: I4mm, No. 107), whereas CeAgAl 3 adopts the related orthorhombic PbSbO 2 Cl structure (Cmcm, No. 63). An attempt to grow CeNiAl 3 resulted in the composition CeNi 2 Al 5 . Low temperature resistivity measurements down to ∼0.1 K did not reveal evidence suggestive of magnetic order in CePtAl 3 and CePdAl 3 . In contrast, CeAuAl 3 , CeCuAl 3 and CeAgAl 3 display signatures of magnetic transitions at 1.3 K, 2.1 K and 3.2 K, respectively. This is consistent with previous reports of antiferromagnetic order in CeAuAl 3 , and CeCuAl 3 as well as ferromagnetism in CeAgAl 3 , respectively.

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“…CeCuAl 3 crystallizes in an ordered non-centrosymmetric tetragonal structure of BaNiSn 3 -type ( I 4 mm ). , This structure type is well-known for CeRhSi 3 and CeIrSi 3 compounds ordering anti-ferromagnetically and exhibiting pressure-induced superconductivity. , Nevertheless, superconductivity in CeCuAl 3 was not observed down to 1 K under applied pressure up to 8 GPa. , The magnetic behavior of CeCuAl 3 is generally discussed in the frame of the interplay between the magnetic RKKY and Kondo interactions ,,− and is also influenced by the low-lying first excited CEF state. The splitting between the ground-state and the first excited state amounts to 1.3 meV .…”

Section: Introductionmentioning

confidence: 99%

Magnetic Structure and Excitations in CeCu_xAl_4–x System

et al. 2017

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CeCuAl crystallizing in the tetragonal BaNiSn-type structure and CeCuAl solid solutions were investigated by means of elastic and inelastic neutron scattering. Powder neutron diffraction brought information on both temperature evolution of crystallographic parameters and magnetic order at low temperatures. No structural change was observed in the investigated temperature range from 1.5 to 300 K. Weak magnetic peaks outside nuclear Bragg positions observed in solid solutions with 0.90 ≤ x ≤ 1.10 were described by the propagation vector k = (0.40 + δ, 0.60 + δ, 0), where δ ≈ 0.02 and δ ≈ 0.01. The magnetic structure of CeCuAl consists of two components: an anti-ferromagnetic one described by the same k and a ferromagnetic one with k = (0, 0, 0) and magnetic moments lying within the tetragonal basal plane. The evolution of magnetic excitations as a function of Cu-Al concentration in CeCuAl was studied by inelastic neutron scattering. The measured spectra of CeCuAl and the solution with x = 0.95 point to a three-magnetic-peak energy scheme, while only two excitations are expected from the local symmetry conditions on Ce atoms. The standard two-peak spectrum of crystal electric field excitations was observed for Cu-Al substitutions further from the 1:1:3 stoichiometry (x = 0.75 and 1.10). The intermediate concentrations (x = 0.90 and 1.05) exhibit spectra on the border between the former cases with a less clear pronounced first inelastic magnetic peak. The observed behavior is discussed considering the evolution of structural parameters in the CeCuAl system and the coupling between the lattice vibrations and the crystal electric field excitations.

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High pressure electrical resistivity of CeCuAl₃

Cited by 9 publications

References 11 publications

Electrical resistivity study of CeZn11: Magnetic field and pressure phase diagram up to 5 GPa

Electrical resistivity study of CeZn11: Magnetic field and pressure phase diagram up to 5 GPa

Single crystal growth of CeTAl3 (T = Cu, Ag, Au, Pd and Pt)

Magnetic Structure and Excitations in CeCu_xAl_4–x System

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High pressure electrical resistivity of CeCuAl3

Cited by 9 publications

References 11 publications

Electrical resistivity study of CeZn11: Magnetic field and pressure phase diagram up to 5 GPa

Electrical resistivity study of CeZn11: Magnetic field and pressure phase diagram up to 5 GPa

Single crystal growth of CeTAl3 (T = Cu, Ag, Au, Pd and Pt)

Magnetic Structure and Excitations in CeCuxAl4–x System

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High pressure electrical resistivity of CeCuAl₃

Magnetic Structure and Excitations in CeCu_xAl_4–x System