Superconductivity in ThT2B2C and Strong Magnetismin UT2B2C (T=Ni, Rh and Pt)

Takabatake, Toshiro; Maeda, Y.; Konishi, Taku; Fujii, H.

doi:10.1143/jpsj.63.2853

Cited by 31 publications

(23 citation statements)

References 14 publications

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“…Here ACE F is the crystal field splitting between two lowest Kramers doublets for the Ce(f 1) ion in a low-symmetry crystalline environment. This theory seems to be applicable to CeNiSn although the CEF splitting was not detected in this system whereas it was detected in the isostructural CePtSn compound [7]. Nevertheless we can refer to the nearest in chemical composition tetragonal CeNi2Sn2 compound where an extremely small value of AczF~17K was observed [23].…”

Section: Effect Of the Weak Crystal Field On The Low-lying Excitationmentioning

confidence: 76%

“…2 that the thermal expansion coefficient within the temperature interval 1K<T<5K (Fig. 2) obeys the power law icy(T) = A T+ F T 2 both in zero and finite magnetic fields with the coefficient A increasing from 0.3 at B=0 to 3.6 at B = 8 T (in units 10-v K-2) and the coefficient F decreasing from 7.5 at B--0 to 2.6 at B=8T (in units 10-s K-3).1 This result correlates with the increasing 7 and diminishing q in the temperature dependence of the heat capacity in growing magnetic field [7,9].…”

Section: The Influence Of a Magnetic Field On The Low-temperature Thementioning

confidence: 91%

“…Among these systems there are compounds Ce3Bi4Pt3, U3Sb4Pta with a well-defined and wide enough energy gap A ~ 50-200 K [2,3], and the equiatomic compounds CeNiSn I-4, 5] and CeRhSb 1-6] where the energy gap (or quasigap) was estimated as A < 10 K. Its existence in CeNiSn was established by studying the thermal, magnetic, transport and elastic properties. (see [1][2][3][4][5][6][7] for a review of recent experimental results).…”

Section: Introductionmentioning

confidence: 99%

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On the low-temperature thermal properties and low-energy Fermi excitations in CeNiSn

Kikoin

Visser

Bakker

et al. 1994

Z. Physik B - Condensed Matter

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Abstract. The thermal expansion of a single crystal of the intermetallic compound CeNiSn has been measured at low temperatures 0.3 K < T< 12 K and in a magnetic field up to 8 T. A large anisotropy of the linear expansion is observed which is strongly influenced by the magnetic field. These data are interpreted within the theory explaining the origin of the quasigap in the heavy fermion spectrum of CeNiSn by the interplay between the heavy fermions and low-energy excitations in non-cubic Kondo lattices.

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Section: Effect Of the Weak Crystal Field On The Low-lying Excitationmentioning

confidence: 76%

Section: The Influence Of a Magnetic Field On The Low-temperature Thementioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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On the low-temperature thermal properties and low-energy Fermi excitations in CeNiSn

Kikoin

Visser

Bakker

et al. 1994

Z. Physik B - Condensed Matter

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“…The most striking property of these materials is the opening of an energy gap in the quasiparticle excitation spectrum. Of particular interest are the cerium compounds CeNiSn and CeRhSb, where a small energy gap (za-4-10 K) opens at low temperatures (Tg-10 K) in the enhanced density of states [1,2]. Evidence for the insulating ground state is inferred from the transport, magnetic and thermal properties below Tg, specifically from the strong increase in the electrical resistivity, the sudden increase in the absolute value of the Hall coefficient (IRHI) and the gradual decrease in the specific heat divided by temperature (c/T).…”

Section: Introductionmentioning

confidence: 99%

“…Under high pressure or in a strong magnetic field the gap is suppressed and the normal metallic behaviour is restored [1].…”

Section: Introductionmentioning

confidence: 99%

Thermal expansion of the Kondo insulator CeRhSb

Nolten

Visser

Kayzel

et al. 1995

Physica B: Condensed Matter

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Thermal expansion of the Kondo insulator CeRhSbNolten, A.J.; de Visser, A.; Kayzel, F.E.; Franse, J.J.M.; Tanaka, H.; Takabatake, T. Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. AbstractThe linear coefficients of thermal expansion, a(T), of the Kondo insulator CeRhSb and its non-f-electron analog LaRhSb have been measured on polycrystalline samples in the temperature range 1.5-200 K. After subtracting the phonon contribution (0 o = 260 K), the f-electron contribution to the thermal expansion, am(T), shows two distinct features, a broad maximum is centered at 125 K, while a large shoulder appears below 40 K. In a plot of t~., / T versus T, a maximum appears at the temperature where the energy gap opens, Tg = 10 K. For T < Tg, a.,(T) follows an aT + bT 2 law, which is compatible with a description of the energy gap vanishing on lines at the Fermi surface.

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