Abstract
The studies of the magnetoresistivity (MR) for Ce1−xLaxNiAl4 (x = 0.0, 0.1, 0.2, 0.4, 0.6) intermetallic alloys are reported. CeNiAl4 seems to represent a classical Kondo lattice. All other compounds (0.1 ≤ x ≤ 0.6) exhibit at low temperature a logarithmic increase in electrical resistivity with decrease of temperature as expected for Kondo systems. The low temperature resistivity of Ce1−xLaxNiAl4 is sensitive to the applied magnetic field. The amplitude of the MR is always negative and diminished with increasing temperature. The field dependence has been found to be similar to that obtained for other Kondo compounds. Results of the MR measurements for Ce1−xLaxNiAl4 compounds are analyzed based on the theory developed calculations by Schlottmann for single ions. The analysis yields the values of the Kondo temperature (TK) and effective moment of the Kondo ion (μK).
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