Kondo screening of the spin and orbital magnetic moments of Fe impurities in Cu

Article

关键词: RAY CIRCULAR-DICHROISM;    LOW-TEMPERATURES;    ALLOYS;    METALS;    SUSCEPTIBILITY;    RESISTANCE;    MINIMUM;    SYSTEMS;    COPPER;    MODEL;   

DOI  :  10.1103/PhysRevB.95.041108

来源: SCIE

【 摘 要 】

We use x-ray magnetic circular dichroism to evidence the effect of correlations on the local impurity magnetic moment in an archetypal Kondo system, namely, a dilute Cu: Fe alloy. Applying the sum rules on the Fe L-2,L-3 absorption edges, the evolution of the spin and orbital moments across the Kondo temperature are determined separately. The spin moment presents a crossover from a nearly temperature-independent regime belowtheKondo temperature to a paramagnetic like regime above. Conversely, the weak orbital moment shows a temperature-independent behavior in the whole temperature range, suggesting different Kondo screening temperature scales for the spin and orbital moments.

【 授权许可】

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