Magnetic moments in chemically ordered mass-selected CoPt and FePt clusters

Véronique Dupuis (1) , G. Khadra (1) , S. Linas (1) , A. Hillion (1) , L. Gragnaniello (2) , Alexandre Tamion (1) , Juliette Tuaillon-Combes (1) , Laurent Bardotti (1) , Florent Tournus (1) , E. Otero (3) , P. Ohresser (3) , A. Rogalev (4) , F. Wilhelm (4)

1 ILM - Institut Lumière Matière [Villeurbanne]
2 Institute of Condensed Matter Physics [Lausanne]
3 SSOLEIL - Synchrotron SOLEIL
4 ESRF - European Synchrotron Radiation Facility

By combining high photon flux and chemical selectivity, X-ray absorption spectroscopy and X-ray magnetic circular dichroism (XMCD) have been used to study the magnetism of CoPt and FePt clusters before and after their transition to the chemically ordered L10-like phase. Compared to the bulk, we find larger magnetic spin and orbital moments of Fe, Co and Pt atoms in nanoalloys.

Domaines: Chimie; Physique [physics]; Sciences de l'ingénieur [physics]

Véronique Dupuis, G. Khadra, S. Linas, A. Hillion, L. Gragnaniello, et al.. Magnetic moments in chemically ordered mass-selected CoPt and FePt clusters. Journal of Magnetism and Magnetic Materials, 2015, 383, pp.73-77. ⟨10.1016/j.jmmm.2014.12.061⟩. ⟨hal-02308639⟩