Magnetic, specific heat and transport properties of CePd2Ge2

Besnus, M.J.; Essaihi, A.; Fischer, G.; Hamdaoui, N.; Meyer, A.

doi:10.1016/0304-8853(92)90631-w

Cited by 23 publications

(12 citation statements)

References 7 publications

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“…The γ and ∆ values of CePd 2 Ge 2 obtained here are larger than those reported in Ref. [26] due to the enlarged temperature range accessible in the present study. However, the absolute values of C p at T N are almost the same.…”

Section: A Sample Preparation and Characterizationcontrasting

confidence: 82%

“…The Kondo temperature in CePd 2 Ge 2 at low pressures is small in comparison to the crystal field splitting ∆ 1 = 110 K and ∆ 2 = 220 K [26]. Therefore, ρ mag (T ) shows only one maximum at T max at low pressure.…”

Section: Discussionmentioning

confidence: 87%

“…CePd 2 Ge 2 enters an antiferromagnetically ordered phase at T N ≈ 5.1 K [23,24,25,26]. Its Sicounterpart, the HF system CePd 2 Si 2 exhibits a similar magnetic structure with T N ≈ 10 K [27,28].…”

Section: Introductionmentioning

confidence: 99%

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Calorimetric and transport investigations ofCePd2+xGe2−x
Wilhelm
¹
,
Jaccard²
2002
Phys. Rev. B

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The influence of pressure on the magnetically ordered CePd2.02Ge1.98 has been investigated by a combined measurement of electrical resistivity, ρ(T ), and ac-calorimetry, C(T ), for temperatures in the range 0.3 K < T < 10 K and pressures, p, up to 22 GPa. Simultaneously CePd2Ge2 has been examined by ρ(T ) down to 40 mK. In CePd2.02Ge1.98 and CePd2Ge2 the magnetic order is suppressed at a critical pressure pc = 11.0 GPa and pc = 13.8 GPa, respectively. In the case of CePd2.02Ge1.98 not only the temperature coefficient of ρ(T ), A, indicates the loss of magnetic order but also the ac-signal 1/Vac ∝ C/T recorded at low temperature. The residual resistivity is extremely pressure sensitive and passes through a maximum and then a minimum in the vicinity of pc. The (T, p) phase diagram and the A(p)-dependence of both compounds can be qualitatively understood in terms of a pressure-tuned competition between magnetic order and the Kondo effect according to the Doniach picture. The temperature-volume (T, V ) phase diagram of CePd2Ge2 combined with that of CePd2Si2 shows that in stoichiometric compounds mainly the change of interatomic distances influences the exchange interaction. It will be argued that in contrast to this the much lower pc-value of CePd2.02Ge1.98 is caused by an enhanced hybridization between 4f and conduction electrons.

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Section: A Sample Preparation and Characterizationcontrasting

confidence: 82%

Section: Discussionmentioning

confidence: 87%

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Calorimetric and transport investigations ofCePd2+xGe2−x
Wilhelm
¹
,
Jaccard²
2002
Phys. Rev. B

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“…The neutron diffraction experiments both on polycrystalline sample and single crystalline sample confirmed the antiferromagnetic ordering with the spins pointing along the [110] direction [8,7]. On the other hand, the magnetic properties of iso-electronic CePd 2 Ge 2 have been investigated only on polycrystalline samples [9,10,11,12]. Besnus et al [9] reported the magnetic and thermal properties of CePd 2 Ge 2 which orders antiferromagnetically at T N = 5.1 K. They estimated the crystal field parameters from the magnetic susceptibility and from the Schottky heat capacity and inferred the crystal field split energy levels to be located at 0, 110 and 220 K corresponding to the three doublets.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the magnetic properties of iso-electronic CePd 2 Ge 2 have been investigated only on polycrystalline samples [9,10,11,12]. Besnus et al [9] reported the magnetic and thermal properties of CePd 2 Ge 2 which orders antiferromagnetically at T N = 5.1 K. They estimated the crystal field parameters from the magnetic susceptibility and from the Schottky heat capacity and inferred the crystal field split energy levels to be located at 0, 110 and 220 K corresponding to the three doublets. The magnetic structure of CePd 2 Ge 2 was determined by Feyerherm et al and they found that the magnetic moment points along the [110] direction [10] similar to the case of CePd 2 Si 2 .…”

Section: Introductionmentioning

confidence: 99%

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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Survey of compounds and properties

Chełkowska¹

Rare Earth Elements, Alloys and Compounds

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Magnetic, specific heat and transport properties of CePd2Ge2

Cited by 23 publications

References 7 publications

Calorimetric and transport investigations ofCePd2+xGe2−x
Wilhelm
¹
,
Jaccard²
2002
Phys. Rev. B

Calorimetric and transport investigations ofCePd2+xGe2−x
Wilhelm
¹
,
Jaccard²
2002
Phys. Rev. B

Anisotropic magnetic properties and crystal electric field studies on CePd₂Ge₂single crystal

Survey of compounds and properties

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Magnetic, specific heat and transport properties of CePd2Ge2

Cited by 23 publications

References 7 publications

Calorimetric and transport investigations ofCePd2+xGe2−xWilhelm1, Jaccard2 2002Phys. Rev. B

Calorimetric and transport investigations ofCePd2+xGe2−xWilhelm1, Jaccard2 2002Phys. Rev. B

Anisotropic magnetic properties and crystal electric field studies on CePd2Ge2single crystal

Survey of compounds and properties

Contact Info

Product

Resources

About

Calorimetric and transport investigations ofCePd2+xGe2−x
Wilhelm
¹
,
Jaccard²
2002
Phys. Rev. B

Calorimetric and transport investigations ofCePd2+xGe2−x
Wilhelm
¹
,
Jaccard²
2002
Phys. Rev. B

Anisotropic magnetic properties and crystal electric field studies on CePd₂Ge₂single crystal