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

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 te...

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Detalles Bibliográficos
Autores: Joly, Lilian, Kappler, J. P., Ohresser, P., Sainctavit, Philippe, Henry, Y., Gautier, F., Schmerber, G., Kim, D. J., Goyhenex, C., Bulou, H., Bengone, O., Kavich, J. J., Gambardella, Pietro|||0000-0003-0031-9217, Scheurer, F.
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:225321
Acceso en línea:https://ddd.uab.cat/record/225321
https://dx.doi.org/urn:doi:10.1103/PhysRevB.95.041108
Access Level:acceso abierto
Palabra clave:Kondo effect
Descripción
Sumario: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.

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