Kondo behavior in antiferromagnetic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CeNiGe</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Pikul, Adam; Kaczorowski, D.; Plackowski, T.; Czopnik, A.; Michor, H.; Bauer, E.; Hilscher, G.; Rogl, P.; Grin, Yu.

doi:10.1103/physrevb.67.224417

Cited by 70 publications

(94 citation statements)

References 37 publications

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“…studies. 7,9) There is no anomaly around 5.0 K in the present heat capacity, which is contrary to the neutron scattering experiment which showed the successive magnetic phase transitions at 5.5 and 5.0 K as described in the introduction.…”

Section: Methodscontrasting

confidence: 50%

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe₃by ac Calorimetry

et al. 2006

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We measured the heat capacity of the pressure-induced superconductor CeNiGe3 by the ac calorimetry under high pressure up to 2.4 GPa using a single crystal sample grown by the Bi-flux method. The heat capacity Cac shows the λ-type anomaly at Néel temperature TN. The pressure dependence of TN is consistent with those determined previous studies by the resistivity measurement under high pressure. At 2.1 and 2.4 GPa, the heat capacity anomaly was observed around 0.3 K. This temperature is close to the superconducting transition temperature Tsc determined by the previous resistivity measurement. Therefore, the heat capacity anomaly may be due to the superconducting transition. The value of Tsc by the present heat capacity measurement was larger than those by the resistivity measurement. This might reflect a sample dependence.

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Section: Methodscontrasting

confidence: 50%

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe₃by ac Calorimetry

et al. 2006

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“…Although the above equation is valid for T ≪ ∆, it provides a good fit to our experimental data in the magnetically ordered state right upto T N . The spin-wave gap is almost the same for both the crystallographic directions and it is comparable to T N as observed in other antiferromagnet Ce compounds [19,20]. Figure 5 shows the temperature dependence of the heat capacity C p of CePd 2 Ge 2 measured in the temperature range 0.05 to 80 K. Also shown in the main panel of Fig.…”

Section: Electrical Resistivitysupporting

confidence: 72%

Anisotropic magnetic properties and crystal electric field studies on CePd₂Ge₂single crystal

Maurya

Kulkarni

Dhar

et al. 2013

J. Phys.: Condens. Matter

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Abstract.The anisotropic magnetic properties of the antiferromagnetic compound CePd 2 Ge 2 , crystallizing in the tetragonal crystal structure have been investigated in detail on a single crystal grown by Czochralski method. From the electrical transport, magnetization and heat capacity data, the Néel temperature is confirmed to be 5.1 K. Anisotropic behaviour of magnetization and resistivity is observed along the two principal crystallographic directions viz., [100] and [001]. The isothermal magnetization measured in the magnetically ordered state at 2 K exhibits a spin reorientation at 13.5 T for field applied along [100] direction, whereas the magnetization was linear along the [001] direction attaining a value of 0.94 µ B /Ce at 14 T. The reduced value of the magnetization is attributed to the crystalline electric field (CEF) effects. A sharp jump in the specific heat at the magnetic ordering temperature is observed. After subtracting the phononic contribution, the jump in the heat capacity amounts to 12.5 J/K mol which is the expected value for a spin 1 2 system. From the CEF analysis of the magnetization data the excited crystal field split energy levels were estimated to be at 120 K and 230 K respectively, which quantitatively explain the observed Schottky anomaly in the heat capacity. A magnetic phase diagram has been constructed based on the field dependence of magnetic susceptibility and the heat capacity data.

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“…Previously we reported on the results of AC magnetic susceptibility and specific heat measuremets performed on CeNiGe 3 , Ce 2 Ni 3 Ge 5 , Ce 3 NiGe 2 , and Ce 3 Ni 2 Ge 7 [2,3]. Here, we discuss the magnetic contributions to the electrical resistivity of these compounds.…”

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confidence: 95%

Kondo effect in the presence of crystal‐field in Ce–Ni–Ge compounds

Pikul

Kaczorowski

Rogl

et al. 2003

Physica Status Solidi (b)

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are typical for simple intermetallics. In turn, the magnetic contributions q mag ðTÞ to the resistivity of the Ce-based phases reveal in the paramagnetic region logarithmic slopes and humps, characteristic of Kondo systems with strong crystal-field interactions, as predicted by the Cornut-Coqblin theory. The total crystal-field splittings of the 2 F 5=2 ground multiplet of Ce 3þ ions were estimated to be of 100-200 K. In the magnetically ordered region the resistivity strongly decreases showing at the lowest temperatures a behavior typical for electron-magnon scattering.The recent discovery of pressure-induced heavy-fermion superconductivity in CeNi 2 Ge 2 [1] has turned attention to other phases forming in the Ce-Ni-Ge system. Previously we reported on the results of AC magnetic susceptibility and specific heat measuremets performed on CeNiGe 3 , Ce 2 Ni 3 Ge 5 , Ce 3 NiGe 2 , and Ce 3 Ni 2 Ge 7 [2,3]. Here, we discuss the magnetic contributions to the electrical resistivity of these compounds.Polycrystalline samples of CeNiGe 3 , Ce 2 Ni 3 Ge 5 , Ce 3 NiGe 2 , Ce 3 Ni 2 Ge 7 , and their nonmagnetic La or Y-based analogues were prepared by arc melting the stoichiometric amounts of the elements under purified argon atmosphere. Next, the pellets were wrapped in thin molybdenum foil, sealed in evacuated quartz tubes and heat-treated in resistance furnaces. All the Ce compounds were annealed at 800 C for 1 week and the La ones at 600 C for 2 weeks. Quality of the specimens was checked by means of X-ray powder diffraction and microprobe analysis. The samples selected for resistivity measurements were found to be single phase with the crystal structures as reported in the literature [4]. The electrical resistivity was measured on bar-shaped samples in the temperature range 1.5-300 K using a standard DC four-probe technique with spot-welded contacts strengthened mechanically with silver-epoxy paste.All the La(Y)-based conpounds were found to exhibit the electrical behavior characteristic of simple nonmagnetic intermetallics. Their qðTÞ curves can be well described using modified Bloch-Grçn-eisen relation

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Kondo behavior in antiferromagneticCeNiGe3

Cited by 70 publications

References 37 publications

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe₃by ac Calorimetry

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe₃by ac Calorimetry

Anisotropic magnetic properties and crystal electric field studies on CePd₂Ge₂single crystal

Kondo effect in the presence of crystal‐field in Ce–Ni–Ge compounds

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Kondo behavior in antiferromagneticCeNiGe3

Cited by 70 publications

References 37 publications

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe3by ac Calorimetry

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe3by ac Calorimetry

Anisotropic magnetic properties and crystal electric field studies on CePd2Ge2single crystal

Kondo effect in the presence of crystal‐field in Ce–Ni–Ge compounds

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Product

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About

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe₃by ac Calorimetry

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe₃by ac Calorimetry

Anisotropic magnetic properties and crystal electric field studies on CePd₂Ge₂single crystal