Kondo effect and quadrupolar interactions in single-crystal CePd2Al3

Crystal symmetry and electronic properties of heavy-fermion MPd2Al3 (M = Ce, U)

“…T ..... ~ 21 K This. in contrast, to ihe position o~ the maxinlum in the c]cct~ ~-cal resistivity,,ol T), which shifts from 32 K in polycrystals towards 6.3 K ((tl and 5.0 K (c) [3,5]. Thus, the maximum in S(T) seems to be directly related ',o Ihe crystalfield excitation at A ~ = ~3 K. which does not change for the various samples.…”

“…temperature TN = 2.7 K, Kondo temperature TK = 191Z and crystal-field splitting energy A l = 33 K, of CePdzAI~ from bulk experiments. Strong sample dependences between polycrystals and singlecrystalline samples were found in the values of T, for UPdzAI3 [4] and Tr~ for CePdeA13 [5]. In fact, single crystals of ('ePd,Al~ do not order magnetically down to 0.3K.…”

Sample Dependence of Magnetic Properties and Determination of Antiferromagnetic Structure of NdPd2Al3

“…The compositions of the final NdPd 2 Al 3 sammay be characterized (3,17) as a heavy-fermion antiferroples, which were not determined, are likely to be slightly magnet (Ͳ ϭ 380 mJ K Ϫ2 mol Ϫ1 , T N ϭ 2.8 K), which is changed because of the different vapor pressures of the located very close to the magnetic-to-nonmagnetic boundconstituents. For example, a hypothetical evaporation of ary in the Kondo-lattice phase diagram.…”

“…For well-prepared polycrystalline ma-Room temperature lattice parameters of the NdPd 2 Al 3 terial of CePd 2 Al 3 , characterized by small lattice constants, samples were determined by the X-ray whole-pattern delong-range antiferromagnetic ordering with a cerium mocomposition method (18). As internal standard, comment of 0.47(2) Ȑ B at saturation (4) appears below T N ϭ mercially available high-purity silicon powder (a ϭ 2.8 K. Further polycrystalline CePd 2 Al 3 samples prepared 5.430940(35) Å at 298.1 K; Standard Reference Material by a splat cooling technique (17) as well as single-crystalline No. 640b, National Bureau of Standards, Gaithersburg, CePd 2 Al 3 samples (5) show a higher degree of structural MD) was used.…”

ScPd 2 Al 3 – New polymorphic phase in Al-Pd-Sc system

“…CePd2Al3 exhibits heavy-fermion behavior at low temperatures with a Kondo effect. Nevertheless the properties are strongly sample dependent and also antiferromagnetic order was detected [1][2][3] . PrPd2Al3 remains paramagnetic down to 1.5 K due to the crystal field effect 4,5) .…”