High-field magnetization studies of some U2T2X compounds

Fukushima, Tetsuya; Matsuyama, S.; Kumada, Takayuki; Kindo, Koichi; Prokeš, K.; Nakotte, H.; Boer, F.R. de; Havela, L.; Sechovský, V.; Winand, J.M.; Rébizant, J.; Spirlet, J.C.

doi:10.1016/0921-4526(94)00967-z

Cited by 19 publications

(7 citation statements)

References 5 publications

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“…Above 10 K, the susceptibility follows a modified Curie-Weiss law, χ = χ 0 +C/(T −θ). These results are similar to the ones obtained on polycrystalline samples up to 35 T [12] and 57 T [13]. In the polycrystalline data a weak nonlinearity was observed, which was not found in the single-crystal data.…”

Section: Magnetization and Susceptibilitysupporting

confidence: 90%

Structural, magnetic and transport properties of single-crystalline

Estrela

Pereira²,

Visser³

et al. 1998

J. Phys.: Condens. Matter

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Single crystals of the heavy-electron compound have been grown by a modified mineralization technique. The x-ray structure refinement shows that single crystals form in the structure, instead of the structure reported for polycrystalline material. The polymorphism of is attributed to the experimental parameters, such as pressure and temperature, during the sample preparation process. The single-crystal susceptibility data reveal a weak maximum for at K, indicating the presence of short-range antiferromagnetic correlations, while has the tendency to diverge at low T (T > 2 K). The electrical resistivity of the single crystals (T > 0.3 K) is best described by with for and for . The magnetic and transport data show pronounced deviations from the standard Fermi-liquid picture, and lead to a classification of as a non-Fermi-liquid compound. As the origin of NFL behaviour in we propose the proximity to a quantum critical point or Kondo disorder.

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Section: Magnetization and Susceptibilitysupporting

confidence: 90%

Structural, magnetic and transport properties of single-crystalline

Estrela

Pereira²,

Visser³

et al. 1998

J. Phys.: Condens. Matter

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“…57 T for polycrystalline material, although with a slight nonlinearity thought to be due to 2% second phase of magnetic UPt(Fukushima et al, 1995).…”

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confidence: 95%

Addendum: Non-Fermi-liquid behavior ind- andf-electron metals

2006

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A relatively new class of materials has been found in which the basic assumption of Landau Fermi-liquid theory-that at low energies the electrons in a metal should behave essentially as a collection of weakly interacting particles-is violated. These ''non-Fermi-liquid'' systems exhibit unusual temperature dependences in their low-temperature properties, including several examples in which the specific heat divided by temperature shows a singular log T temperature dependence over more than two orders of magnitude, from the lowest measured temperatures in the milliKelvin regime to temperatures over 10 K. These anomalous properties, with their often pure power-law or logarithmic temperature dependences over broad temperature ranges and inherent low characteristic energies, have attracted active theoretical interest from the first experimental report in 1991. This article first describes the various theoretical approaches to trying to understand the source of strong temperature-and frequency-dependent electron-electron interactions in non-Fermi-liquid systems. It then discusses the current experimental body of knowledge, including a compilation of data on non-Fermi-liquid behavior in over 50 systems. The disparate data reveal some interesting correlations and trends and serve to point up a number of areas where further theoretical and experimental work is needed. CONTENTS I. Introduction 798 II. Theory 799 A. The single-impurity multichannel Kondo model and non-Fermi liquids 799 B. Quantum critical point theories 800 1. Scaling analysis at a quantum critical point 801 2. Spin-fluctuation theory of non-Fermi-liquid behavior 802 a. Millis and Hertz 802 b. Self-consistent renormalization model 802 3. Local deviation from Fermi-liquid behavior 804 C. Disorder-induced non-Fermi-liquid behavior theories 804 III. Experiment 806 A. Doped systems 807 1. Antiferromagnetism ''distant'' in the phase diagram 807 a. U x Y 1Ϫx Pd 3 (I) 808 b. UCu 5Ϫx Pd x (I) 820 c. UCu 5Ϫx Pt x (II) 822 d. UCu 4 Ni (II) 823 e. UCu 5Ϫx Al x (III) 823 f. Ce 1Ϫx La x Cu 2 Si 2 (I) 824 g. (U x La 1Ϫx) 2 Zn 17 (I) 824 h. U 2 Cu 17Ϫx Al x (I) 825 i. U 1Ϫx Y x Al 2 (I) 825 j. U x Th 1Ϫx Ru 2 Si 2 , xр0.07 (I) 826 k. U x Y 1Ϫx Ru 2 Si 2 , xр0.07 (III) 826 l. U x Th 1Ϫx Pt 2 Si 2 , xр0.07 (III) 826 m. U x Th 1Ϫx Pd 2 Si 2 (I?) 826 n. U 1Ϫx M x Pt 3 (I) 827 o. Ce 1Ϫx Th x RhSb (I?) 827 p. URu 2Ϫx Re x Si 2 (III) 827 q. U 2 Pd 1Ϫx Si 3ϩx (II) 828 r. Ce 0.1 La 0.9 Pd 2 Al 3 (III) 828 s. U 0.1 M 0.9 In 3 , MϭY,Pr,La (I) 828 t. CePt 0.96 Si 1.04 (I?) 828

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“…[5][6][7][8][9][10][11][12][13] In the last three years we have succeeded in growing single crystals of these materials in Karlsruhe; allowing a more detailed examination of the properties. In this paper we confine our attention to the three compounds with TϭNi, Pd, and Pt, and XϭIn.…”

Section: Introductionmentioning

confidence: 99%

Neutron-diffraction studies of single crystals ofU2T2In (T=
Martín-Martín¹,
Pereira²,
Lander³
et al. 1999
Phys. Rev. B
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Neutron-diffraction experiments on single crystals of U 2 T 2 In (TϭNi, Pd, Pt͒ verify the noncollinear magnetic structures found with studies of polycrystalline samples, and determine the values of the ordered moments. Compared to the earlier studies, we find the ordered moments on the uranium atoms larger, and no moment associated with the T atoms, in disagreement with one previous study. The TϭPt sample has a large electronic specific heat and does not order magnetically. We give a detailed description of the low-temperature crystal structure. Polarized-neutron experiments show that the site susceptibilities of the two independent uranium atoms in U 2 Pt 2 In are substantially different and the conduction-electron polarization is unusually large. ͓S0163-1829͑99͒00118-6͔

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High-field magnetization studies of some U2T2X compounds

Cited by 19 publications

References 5 publications

Structural, magnetic and transport properties of single-crystalline

Structural, magnetic and transport properties of single-crystalline

Addendum: Non-Fermi-liquid behavior ind- andf-electron metals

Neutron-diffraction studies of single crystals ofU2T2In (T=
Martín-Martín¹,
Pereira²,
Lander³
et al. 1999
Phys. Rev. B
Self Cite
15
3
16
0
View full text Add to dashboard Cite

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High-field magnetization studies of some U2T2X compounds

Cited by 19 publications

References 5 publications

Structural, magnetic and transport properties of single-crystalline

Structural, magnetic and transport properties of single-crystalline

Addendum: Non-Fermi-liquid behavior ind- andf-electron metals

Neutron-diffraction studies of single crystals ofU2T2In (T=Martín-Martín1, Pereira2, Lander3 et al. 1999Phys. Rev. BSelf Cite153160View full textAdd to dashboardCite

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Neutron-diffraction studies of single crystals ofU2T2In (T=
Martín-Martín¹,
Pereira²,
Lander³
et al. 1999
Phys. Rev. B
Self Cite
15
3
16
0
View full text Add to dashboard Cite