Heavy-fermion behavior of the ferrimagnetic compound<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">UCu</mml:mi></mml:mrow><mml:mrow><mml:mn>5</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant="normal">Sn</mml:mi></mml:math>

Tran, V.H.; Troć, R.; Pietri, R.; Andraka, B.

doi:10.1103/physrevb.60.4696

Cited by 11 publications

(16 citation statements)

References 16 publications

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“…This steep increase at Τ < ΤC/2 we attributed to the Kondo-type scattering (see for details Ref. [15]). As Fig.…”

Section: ((U1-x Thx)cu5sn Systemmentioning

confidence: 75%

“…In this structure the alignment of U magnetic moments is along the hexagonal c-axis. The most striking feature of this structure is that the U moments arranged in the (0,0,0) plane, formed by the sites 2a, are 10 times larger in magnitude than those in the adjacent (0,0,0.25) plane, formed by the sites 2d [15]. The inverse magnetic susceptibility at temperatures 200-1000 Κ follows a Curie-Weiss law with /Jeff = 3.11μ$ and Θ = -63 Κ.…”

Section: ((U1-x Thx)cu5sn Systemmentioning

confidence: 97%

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Anomalous Transport and Thermal Properties of the Solid Solutions U_1-xTh_xCu₅M (M = Al, Ga, In and Sn)

et al. 2000

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UCu5M-type compounds are moderate heavy fermion systems with an antiferromagnetic order below TN = 18, 16-25, and 25 K for M = Al, (Ga, In), and In, respectively, and a ferrimagnetic order with TO = 54 K for M = Sn. We present the results of magnetoresistance measurements as a function of temperature and applied magnetic field for the pure compounds and for their solid solutions containing Th, i.e. U1-xΤhxCu5M. Only in the case of UCu5In a substantial positive contribution to the magnetoresistance was observed at low temperatures, as for normal antiferromagnets. For the Aland Sn-based alloys the magnetoresistance at low temperatures is negative, and its field variation proves the existence of Kondo-type interactions. On Th-substitution the magnetic phase transition is shifted to lower temperature and simultaneously the magnetoresistance becomes less negative. The field dependence of the magnetoresistance of these alloys can be well described by the Coqblin-Schrieffer model. Interestingly, the heat capacity measurements have revealed a general tendency to increase the linear coefficient-γ with magnetic dilution of a given UCu 5 M compound by Th-substitution. This feature reflects an enlargement of the effective mass of conduction electrons with the increase in both the unit cell volume and magnetic dilution. Such a tendency is also observed for the system UCu5(Ιn1-xGax), though the unit cell is here suppressed with increasing z. Thus, a similar physical picture is reached in all these systems but involving probably different mechanisms.

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“…This steep increase at Τ < ΤC/2 we attributed to the Kondo-type scattering (see for details Ref. [15]). As Fig.…”

Section: ((U1-x Thx)cu5sn Systemmentioning

confidence: 75%

Section: ((U1-x Thx)cu5sn Systemmentioning

confidence: 97%

Anomalous Transport and Thermal Properties of the Solid Solutions U_1-xTh_xCu₅M (M = Al, Ga, In and Sn)

et al. 2000

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“…The essential question rises now whether the physics of Ce 5 CuSn 3 matches the Doniach's model of a Kondo lattice, since there is some circumstance that Ce 5 CuSn 3 has at least two different exchange coupling parameters, resulting from the two different Ce sublattices. From a naive reasoning one suspects a similar situation as UCu 5 Sn does [10][11][12]. The latter compound crystallizes in the hexagonal CeNi 5 Sn-type structure (space group: P6 3 /mmc), and is characterized by two nonequivalent sites 2(a) and 2(c) for the uranium atoms.…”

Section: Discussion and Summarymentioning

confidence: 99%

Magnetic, electronic transport and thermodynamic properties of Ce5CuSn3

Tran

2004

Journal of Alloys and Compounds

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“…The linear behavior of H* vs T for T ϾT N yields T* about 9 K for Pϭ3.1 kbar ͑see the inset͒. In the same manner, the MR data obtained for Pϭ6 and 10 kbar were analyzed, yielding, T*ϭ22 (2) and 19͑3͒ K, respectively. These results indicate that applied pressure causes an increase of the Kondo temperature.…”

Section: Electrical Transport Propertiesmentioning

confidence: 99%

“…[1][2][3] All these compounds show interesting physical properties, for instance, the Sommerfeld ratio C p /T of each of them increases with decreasing temperature, reaching values of the order 200 mJ/K 2 mole U at 1 K. However, the physical properties of these compounds have been studied on polycrystalline samples only. In order to elucidate the observed properties we have undertaken investigations on single-crystalline samples.…”

Section: Introductionmentioning

confidence: 99%

Heavy-fermion characteristics inUCu5Alsingle crystals

et al. 2002

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Electronic properties of the antiferromagnetic Kondo compound UCu 5 Al have been investigated through magnetic susceptibility, magnetization, specific heat, electrical resistivity, magnetoresistance, and Hall coefficient measurements on single-crystal and polycrystalline samples. UCu 5 Al orders antiferromagnetically below 16 K and shows a large magnetocrystalline anisotropy. In the paramagnetic state, pronounced incoherent Kondo interactions and crystal field effects are observed. At low temperatures, in spite of the lack of coherence, UCu 5 Al exhibits some characteristic properties of heavy-fermion systems, namely, an enhanced susceptibility, and enhanced electronic specific heat coefficient, revealing an enhanced effective electron mass. The specific heat and transport properties evidence a competition between the Kondo effect and the Ruderman-Kittel-Kasuya-Yosida interactions. This feature, together with the frustration of the magnetic interactions originating from atomic disorder appear to be important for the development of the heavy-fermion state in UCu 5 Al.

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Heavy-fermion behavior of the ferrimagnetic compoundUCu5Sn

Cited by 11 publications

References 16 publications

Anomalous Transport and Thermal Properties of the Solid Solutions U_1-xTh_xCu₅M (M = Al, Ga, In and Sn)

Anomalous Transport and Thermal Properties of the Solid Solutions U_1-xTh_xCu₅M (M = Al, Ga, In and Sn)

Magnetic, electronic transport and thermodynamic properties of Ce5CuSn3

Heavy-fermion characteristics inUCu5Alsingle crystals

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Heavy-fermion behavior of the ferrimagnetic compoundUCu5Sn

Cited by 11 publications

References 16 publications

Anomalous Transport and Thermal Properties of the Solid Solutions U1-xThxCu5M (M = Al, Ga, In and Sn)

Anomalous Transport and Thermal Properties of the Solid Solutions U1-xThxCu5M (M = Al, Ga, In and Sn)

Magnetic, electronic transport and thermodynamic properties of Ce5CuSn3

Heavy-fermion characteristics inUCu5Alsingle crystals

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Product

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Anomalous Transport and Thermal Properties of the Solid Solutions U_1-xTh_xCu₅M (M = Al, Ga, In and Sn)

Anomalous Transport and Thermal Properties of the Solid Solutions U_1-xTh_xCu₅M (M = Al, Ga, In and Sn)