ACTA

Point Contact Properties of R₃Pd₂₀X₆ (R = La, Ce; X = Si, Ge) Cage Compounds

I. Čurlik^a, A.M. Strydom^b and M. Reiffers^{a, c}
^aInstitute of Experimental Physics, Watsonova 47, SK 043 53 Košice, Slovakia
^bPhysics Department, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa
^cFaculty of Sciences, University of Prešov, 17. novembra 1, SK 080 78 Prešov, Slovakia

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Point-contact spectroscopy measurements have been performed on the R₃Pd₂₀X₆ (R = La, Ce; X = Si, Ge) cage compounds. In case of La the characteristic phonon energies have been obtained in agreement with that of the Raman scattering. In Ce₃Pd₂₀Si₆ we have observed asymmetric behaviour of dV/dI(V) dependences which was observed in non-Fermi liquid compound. In Ce₃Pd₂₀Ge₆ we have observed maxima at crystalline electric field energies, influenced by magnetic field. This is connected with quadrupolar ordering transition.

DOI: 10.12693/APhysPolA.118.907
PACS numbers: 71.27.+a, 75.30.-m, 75.30.Mb