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

L. Joly, J. P. Kappler, P. Ohresser, Ph Sainctavit, Y. Henry, F. Gautier, G. Schmerber, D. J. Kim, C. Goyhenex, H. Bulou, O. Bengone, J. Kavich, P. Gambardella, F. Scheurer

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    3 Citations (Scopus)

    Abstract

    © 2017 American Physical Society. 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 L2,3 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 below the Kondo temperature to a paramagneticlike 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.
    Original languageEnglish
    Article number041108
    JournalPhysical Review B
    Volume95
    Issue number4
    DOIs
    Publication statusPublished - 20 Jan 2017

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