Point-Contact Spectroscopy of Crystalline Electric Field of Heterocontacts PrB6 and NdB6 with Pt

M. Vasil'ová a, G. Pristáš a, M. Reiffers a, K. Flachbart a, J. Rusz b and N. Shitsevalova c a Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 043 53 Košice, Slovakia b Institute of Physics, Na Slovance, Praha, Czech Republic c Institute for Problems of Materials Science, Kiev, Ukraine

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Received: 9 07 2007;

Point-contact spectra of single crystals PrB6 and NdB6 are presented. We observed maxima connected with crystalline electric field excitations in agreement with previous results for applied voltage V > 8 mV. Moreover, we observed maxima at 6 mV (PrB6) and 3 mV (NdB6), which are probably connected with phonon modes. Moreover, we observed phonon peak at 10.6 mV in PrB6. Further measurements in magnetic fields and crystalline electric field calculations are necessary.

DOI: 10.12693/APhysPolA.113.267 PACS numbers: 75.47.Np, 71.70.Ch, 74.50.+r