Measurements of the magnetic scattering time in very thin Cu films (thickness t5 nm), homogeneously doped with magnetic Cr atoms (concentration {}100 ppm), are reported. The weak electron localization causes an anomalous magnetoresistance which is very sensitive to the spin-flip scattering of the conduction electrons. The maximum in the temperature dependence of the spin-flip scattering rate is in excellent agreement with the Suhl-Nagaoka approximation for the resonant Kondo scattering in the vicinity of the Kondo temperature TK2 K.
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Haesendonck et al. (1987) studied this question.
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