Single Crystal Growth and Electronic State of UPd2Cd20

Doto, Hiroshi; Hirose, Yusuke; Honda, Fuminori; Li, Dexin; Homma, Yoshiya; Aoki, Dai; Settai, Rikio

doi:10.1016/j.phpro.2015.12.009

Cited by 3 publications

(4 citation statements)

References 13 publications

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“…, with the effective magnetic moment eff µ = 3.36 B µ , the paramagnetic Curie temper ature P Θ = −52 K, and 0 χ = 5.2 10 4 − × − , which is in good agreement with the value of the [110] direction [20]. Here, and B µ are Avogadro's number, Notes: U eq is defined as one third of trace of U ij tensor.…”

Section: Magnetic Propertiessupporting

confidence: 71%

“…Single crystals of UPd 2 Cd 20 were grown by the Cd self-flux method [20]. The starting materials, 3N-pure (99.9%) U, 3N-Pd, and 5N-Cd with an excess Cd were placed in an alumina crucible.…”

Section: Methodsmentioning

confidence: 99%

“…obs cal obs = 0.0345, where F obs and F cal are experimental and calculated structure factors, respectively. X-ray powder diffraction with Cu K α radiation shows a single phase of UPd 2 Cd 20 , where the powder sample was prepared by grinding single crystals [20]. The electrical resistivity was measured by the ordinary four-probe method down to 50 mK using a dilution refrigerator.…”

Section: Methodsmentioning

confidence: 99%

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New heavy-fermion antiferromagnet UPd₂Cd₂₀

Hirose¹,

Doto²,

Honda³

et al. 2016

J. Phys.: Condens. Matter

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We succeeded in growing a new high quality single crystal of a ternary uranium compound UPd2Cd20. From the electrical resistivity, magnetization, magnetic susceptibility, and specific heat experiments, UPd2Cd20 is found to be an antiferromagnetic heavy-fermion compound with the Néel temperature [Formula: see text] = 5 K and exhibits the large electronic specific heat coefficient γ exceeding 500 mJ (K(2)· mol)(-1). This compound is the first one that exhibits the magnetic ordering with the magnetic moments of the U atom in a series of UT2X20 (T: transition metal, X = Al, Zn, Cd). UPd2Cd20 shows typical characteristic features in heavy-fermion systems such as a broad maximum in the magnetic susceptibility at [Formula: see text] and a large coefficient A of T (2) term in the resistivity.

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Section: Magnetic Propertiessupporting

confidence: 71%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

New heavy-fermion antiferromagnet UPd₂Cd₂₀

Hirose¹,

Doto²,

Honda³

et al. 2016

J. Phys.: Condens. Matter

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“…In fact, the Ce 4f states in CeT 2 Al 20 (T = Ti, V, Cr) are found to show a highly hybridized character compared to isostructural CeIr 2 Zn 20 , in which valence instability is observed [38] and finally CeT 2 Cd 20 (T = Ni, Pd) in which Ce 4f hybridization is weak and electrons are fairly localized [39]. Similarly, in UT 2 Al 20 (T = Ti, Cr, Nb, Mo, W) the 5f electrons are strongly delocalized [6,[34][35][36] while in UPd 2 Cd 20 the large local magnetic moment suggests only a weak hybridization [40], with Znbased compounds [41] falling in between the two regimes.…”

Section: Resultsmentioning

confidence: 98%

Synthesis and properties of AxV2Al20 (A = Th, U, Np, Pu) ternary actinide aluminides

Winiarski

Griveau

Colineau

et al. 2017

Journal of Alloys and Compounds

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Polycrystalline samples of A x V 2 Al 20 (A = Ce, Th, U, Np, Pu; 0.7 ≤ x ≤ 1.0) actinide intermetallics were synthesized using the arcmelting method. Crystal structure studies were performed by means of powder x-ray diffraction and the Rietveld refinement method. All studied compounds crystallize in the CeCr 2 Al 20 -type structure (space group Fd-3m, no. 227) with the actinide or Ce atom located in the oversized cage formed by Al atoms. Comparison of the crystallographic results with the reported data for LnV 2 Al 20 (Ln = lanthanoids) counterparts reveals distinctly different behavior of the lanthanide-and actinide-bearing compounds. This difference is suggested to be caused by fairly localized character of the 4f electrons, whereas itinerant character of the 5f electrons is likely seen for U-and Npcontaining phases. Magnetic susceptibility and specific heat measurements did not reveal any magnetic ordering in U 0.8 V 2 Al 20 , Np 0.8 V 2 Al 20 and Pu 0.8 V 2 Al 20 down to 2.5 K. A small anomaly in low-temperature specific heat of Ce 0.8 V 2 Al 20 , U 0.8 V 2 Al 20 , and Np 0.8 V 2 Al 20 is observed, likely arising from a low-energy Einstein mode.

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