DOI: 10.1209/epl/i1997-00268-x

Europhys. Lett, 38 (6), pp. 459-464 (1997)

Magnetism of Mn ultra-thin films grown on (001) bcc Fe studied by X-ray magnetic circular dichroism

S. Andrieu , M. Finazzi , F. Yubero , H. M. Fischer , Ph. Arcade , F. Chevrier , L. Hennet , K. Hricovini , G. Krill and M. Piecuch

Laboratoire de Métallurgie Physique et Science des Matériaux
CNRS-Université Henri Poincaré, BP239, 54506 Vandoeuvre, France
Laboratoire pour l'Utilisation du Rayonnement Electromagnétique, CNRS-CEA-Université Paris-sud, 91405 Orsay, France
Laboratoire de Physique des Matériaux de Surface Université Cergy-Pontoise, 95011 Cergy-Pontoise, France

(received 12 February 1997; accepted in final form 18 April 1997)

PACS. 75.70Ak - Magnetic properties of monolayers and thin films.
PACS. 68.55 - Thin film structure and morphology.
PACS. 61.10Ht - X-ray absorption spectroscopy: EXAFS, NEXAFS, XANES, etc.

Abstract:

The magnetic properties of Mn ultra-thin films epitaxially grown on (001) bcc Fe are studied by soft--X-ray magnetic circular dichroism. At room temperature, the Mn growth is two-dimensional without interdiffusion in Fe, as checked by RHEED and Auger spectroscopy. A net Mn magnetic moment is observed in the Mn thickness range up to 2 monolayers. We find that the Mn/Fe interfacial coupling is definitely ferromagnetic. In this range, the magnetic moment carried per Mn atom is found to be about , which is much smaller than the value of predicted for ferromagnetic Mn ultra-thin films.

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