Magnetic ordering and Kondo behavior in single-crystalline Ce<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>NiSi<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>

Szlawska, Maria; Kaczorowski, D.

doi:10.1103/physrevb.85.134423

Cited by 21 publications

(13 citation statements)

References 37 publications

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“…Note that this γ m is significantly enhanced compared with the one in the paramagnetic state, γ∼220 mJ/mol K 2 . Similar behaviors have been observed in other antiferromagnetic Kondo systems 12,13 . Fig.…”

Section: Resultssupporting

confidence: 87%

Kondo behavior and metamagnetic phase transition in the heavy-fermion compound CeBi2

Zhou

et al. 2018

Phys. Rev. B

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Heavy fermions represent an archetypal example of strongly correlated electron systems which, due to entanglement among different interactions, often exhibit exotic and fascinating physics involving Kondo screening, magnetism and unconventional superconductivity. Here we report a comprehensive study on the transport and thermodynamic properties of a cerium-based heavy fermion compound CeBi2 which undergoes an anti-ferromagnetic transition at TN ∼ 3.3 K. Its high temperature paramagnetic state is characterized by an enhanced heat capacity with Sommerfeld coefficient γ over 200 mJ/molK 2 . The magnetization in the magnetically ordered state features a metamagnetic transition. Remarkably, a large negative magnetoresistance associated with the magnetism was observed in a wide temperature and field-angle range. Collectively, CeBi2 may serve as an intriguing system to study the interplay between f electrons and the itinerant Fermi sea.

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Section: Resultssupporting

confidence: 87%

Kondo behavior and metamagnetic phase transition in the heavy-fermion compound CeBi2

Zhou

et al. 2018

Phys. Rev. B

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“…1 c). The obtained shape is consistent with previous studies of Kondo lattice systems [17]. Beyond the aforementioned broad maximum we have found that logarithmic dependency is obeyed between 58 K and 165 K. The fit of the formula proposed by J. Kondo:…”

Section: Electrical Resistivitysupporting

confidence: 91%

Kondo lattice behavior observed in the CeCu9In2 compound

Kurleto

Szytuła

Goraus

et al. 2019

Journal of Alloys and Compounds

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We report systematic studies of CeCu 9 In 2 , which appears to be a new Kondo lattice system. Electrical resistivity exhibits a logarithmic law characteristic of Kondo systems with a broad maximum at T coh ≈45 K and it obeys the Fermi liquid theory at low temperature. Specific heat of CeCu 9 In 2 is well described by the Einstein and Debye models with electronic part at high temperature. Fitting of the Schottky formula to low temperature 4f contribution to specific heat yielded crystal field splitting of 50.2 K between a doublet and quasi-quartet. The Schotte-Schotte model estimates roughly Kondo temperature as T K ≈5 K, but does not reproduce well the data due to a sharp peak at 1.6 K. This structure should be attributed to a phase transition, a nature of which is possibly antiferromagnetic. Specific heat is characterized with increased Sommerfeld coefficient estimated as γ ≈132 mJ/(mole·K 2 ). Spectra of the valence band, which have been collected with ultraviolet photoelectron spectroscopy (UPS), show a peak at binding energy≈250 meV, which originates from the Ce 4f electrons and is related to the 4f 1 7/2 final state. Extracted 4f contribution to the spectral function exhibits also the enhancement of intensity in the vicinity of the Fermi level. Satellite structure of the Ce 3d levels spectra measured by X-ray photoelectron spectroscopy (XPS) has been analyzed within the framework of the Gunnarsson-Schönhammer theory. Theoretical calculations based on density functional theory (FPLO method with LDA+U approach) delivered densities of states, band structures and Fermi surfaces for CeCu 9 In 2 and LaCu 9 In 2 . The results indicate that Fermi surface nesting takes place in CeCu 9 In 2 .

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Section: Electrical Resistivitysupporting

confidence: 82%

“…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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Magnetic ordering and Kondo behavior in single-crystalline Ce2NiSi3

Cited by 21 publications

References 37 publications

Kondo behavior and metamagnetic phase transition in the heavy-fermion compound CeBi2

Kondo behavior and metamagnetic phase transition in the heavy-fermion compound CeBi2

Kondo lattice behavior observed in the CeCu9In2 compound

Anisotropic magnetic properties and crystal electric field studies on CePd₂Ge₂single crystal

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Magnetic ordering and Kondo behavior in single-crystalline Ce2NiSi3

Cited by 21 publications

References 37 publications

Kondo behavior and metamagnetic phase transition in the heavy-fermion compound CeBi2

Kondo behavior and metamagnetic phase transition in the heavy-fermion compound CeBi2

Kondo lattice behavior observed in the CeCu9In2 compound

Anisotropic magnetic properties and crystal electric field studies on CePd2Ge2single crystal

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Anisotropic magnetic properties and crystal electric field studies on CePd₂Ge₂single crystal