Non-Fermi liquid behavior in polycrystalline Ce 2 PdIn 8

Kaczorowski, D.; Pikul, Adam; Belan, B.; Sójka, Ł.; Kalychak, Yaroslav M.

doi:10.1016/j.physb.2009.07.021

Cited by 19 publications

(35 citation statements)

References 10 publications

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“…5). Linear dependence of resistivity confirms the non-Fermi liquid behaviour reported in [14], which may indicate that the compound appears on the verge of magnetism and the superconductivity is magnetically driven. Below critical temperature T c < 0.69 K a SC transition was observed.…”

Section: Resultssupporting

confidence: 78%

“…The discrepancies in the low temperature behaviour of Ce 2 PdIn 8 were also observed by Kaczorowski et al [14,15], where for the polycrystalline sample they presented normal paramagnetism down to the lowest reached temperature T ~ 0.35 K, while the single crystal was superconducting below T c = 0.68 K. Passing over the other presented (magnetic) transitions above T c , which are of controversial origin, they detected one clear SC phase transition both by resistivity and heat capacity measurements, the highest T c observed for Ce 2 PdIn 8 . …”

Section: Resultssupporting

confidence: 54%

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Solution growth of Ce–Pd–In single crystals: Characterization of the heavy-fermion superconductor Ce2PdIn8

et al. 2010

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Solution growth of single crystals of the recently reported new compound Ce 2 PdIn 8 was investigated. When growing from a stoichiometry in a range 2:1:20 -2:1:35, single crystals of CeIn 3 covered by a thin (~50 μm) single-crystalline layer of Ce 2 PdIn 8 were mostly obtained. Using palladium richer compositions the thickness of the Ce 2 PdIn 8 layers were increased, which allowed mechanical extraction of single-phase slabs of the desired compound suitable for a thorough study of magnetism and superconductivity. In some solution growth products also CePd 3 In 6 (LaNi 3 In 6 -type of structure) and traces of phases with the stoichiometry CePd 2 In 7 , Ce 1.5 Pd 1.5 In 7 (determined only by EDX) have been identified. Magnetic measurements of the Ce 2 PdIn 8 single crystals reveal paramagnetic behaviour of the Ce 3+ ions with significant magnetocrystalline anisotropy. Above 70 K the magnetic susceptibility follows the Curie-Weiss law with considerably different values of the paramagnetic Curie temperature, for the magnetic field applied along the a-(-90 K) and c-(-50 K) axis. Below the reported critical temperature for superconductivity T c (0.69 K) the electrical resistivity drops to zero. Comparative measurements of the electrical resistivity, heat capacity and AC susceptibility of several crystals reveal that the superconducting transition is strongly sample-dependent. IntroductionIn some Ce-based compounds, the interaction of the Ce ions with the conduction electrons often leads to a large enhancement of the effective electron mass. These socalled heavy-fermion (HF) compounds exhibit attractive electronic properties, such as strongly enhanced paramagnetism, non-Fermi liquid behaviour, interplay between magnetism and superconductivity (SC), etc. During the last decade, the attention of many researchers has been focused on the series of HF materials of the general chemical formula Ce m T n In 3m+2n where m, n = 1 or 2 and T = Co, Rh, Ir. These compounds crystallize in the Ho m Co n Ga 3m+2n -type tetragonal structures with the space group P4/mmm. These structures are built by n layers of distorted cuboctahedra [CeIn 3 ] and one monolayer of rectangular parallelepipeds [TIn 2 ] stacked sequentially in the [001] direction [1] making the structure to be quasi-2D. The main building block of these compounds, the cubic CeIn 3 , is a heavy-fermion antiferromagnet (AF) with a Néel temperature T N = 10.2 K [2] and becomes superconducting (SC) under pressure [3]. The whole Ce m T n In 3m+2n series is characterized by interplay between magnetism and unconventional superconductivity, which makes these compounds suitable for thorough studies of varieties of the two cooperative phenomena in strongly correlated electron systems. The quasi-2D R m T n In 3m+2n crystal structure provides investigation of the effect of varying dimensionality on magnetism and unconventional superconductivity because

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Section: Resultssupporting

confidence: 78%

Section: Resultssupporting

confidence: 54%

Solution growth of Ce–Pd–In single crystals: Characterization of the heavy-fermion superconductor Ce2PdIn8

et al. 2010

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“…2. T K1 equals 15 K which is of the same order as found in Ce 2 PdIn 8 (T K = 10 K) [22]. Recognizing the assumption that the Ce1-sublattice is responsible for SC would imply that the normal state specific heat coefficient is not γ n as it contains contribution from the Ce2-sublattice, but equals γ 0 .…”

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confidence: 54%

Magnetism, superconductivity, and quantum criticality in the multisite cerium heavy-fermion compoundCe3PtIn11

et al. 2015

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The properties of the novel heavy fermion superconductor Ce3PtIn11 are investigated by thermodynamic and transport measurements at ambient and under hydrostatic pressure. At ambient pressure the compound exhibits two successive magnetic transitions at T1 ≃ 2.2 K and TN ≃ 2 K into antiferromagnetically ordered states and enters into a heavy fermion superconducting phase below Tc ≃ 0.32 K. The coexistence of long-range magnetic order and superconductivity is discussed in the context of the existence of the two crystallographically inequivalent Ce-sites in the unit cell of Ce3PtIn11. The experimental data allow us to construct the pressure-temperature phase diagram.

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“…Another representative of the Ce n TIn 3n+2 series is the compound Ce 2 PdIn 8 that has been first identified as a paramagnetic Kondo lattice with some NFL features at low temperatures [13]. In the course of subsequent studies, Ce 2 PdIn 8 has been characterized as an ambientpressure heavy-fermion superconductor with the onset of the superconducting state at T c = 0.68 K, strongly enhanced normal-state electronic specific heat coefficient γ ≈ 500 mJ/(mol K 2 ) per Ce atom, and distinct deviations from the Fermi liquid behavior evidenced in the electrical transport and thermodynamic properties [14][15][16][17][18][19][20][21], as well as in the spectroscopic characteristics: the nuclear quadrupole resonance [22] and inelastic neutron scattering [23] data.…”

Section: Introductionmentioning

confidence: 99%

Electronic structure of the heavy fermion superconductor Ce2PdIn8: Experiment and calculations

Werwiński

Szajek

Ślebarski

et al. 2015

Journal of Alloys and Compounds

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Non-Fermi liquid behavior in polycrystalline Ce 2 PdIn 8

Cited by 19 publications

References 10 publications

Solution growth of Ce–Pd–In single crystals: Characterization of the heavy-fermion superconductor Ce2PdIn8

Solution growth of Ce–Pd–In single crystals: Characterization of the heavy-fermion superconductor Ce2PdIn8

Magnetism, superconductivity, and quantum criticality in the multisite cerium heavy-fermion compoundCe3PtIn11

Electronic structure of the heavy fermion superconductor Ce2PdIn8: Experiment and calculations

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