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Magnetic Field Dependence of the Electrical Resistivity in Non-Fermi Liquid U_{0.05}Y_{0.95}Al_{2}, U_{0.2}Y_{0.8}Pd_{3} and UCu_{5-x}Pd_{x} (x=1.0,0.9)

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Strydom A. M., Plessis P. d. V. D.

Acta Physica Polonica A

2000

vol. 98

issue 5

593-597

We investigate the influence of applied magnetic fields up to B=8T on the electrical resistivity attemperatures down to 1.5K for three established non-Fermi liquid systems U_{0.05}Y_{0.95}Al_{2}, U_{0.2}Y_{0.8}Pd_{3} and UCu_{5-x}Pd_{x} (x=1.0,0.9). We follow the approach that an unconventional Kondo mechanism is often seen to be operative at low temperatures in some non-Fermi liquid systems where there are logarithmic or power-law divergences in the temperature dependences of magnetic susceptibility, the specific heat, and the electrical resistivity. In the above systems the incoherent Kondo scattering dominates the electrical resistivity ρ(T) at higher temperatures, while at low temperatures ρ~T^{n} with n≈1, instead of n=2 as expected for a Fermi-liquid. We show how the power-law dependence is affected by a magnetic field. The isothermal magnetoresistivity as a function of field is analysed in terms of the Bethe ansatz description in order to extract values of the characteristic Kondo temperature T_{K}.

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1 Acta Physica Polonica A

1 2000

1 Plessis P. d. V. D.

1 Strydom A. M.

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Magnetic Field Dependence of the Electrical Resistivity in Non-Fermi Liquid U_{0.05}Y_{0.95}Al_{2}, U_{0.2}Y_{0.8}Pd_{3} and UCu_{5-x}Pd_{x} (x=1.0,0.9)