X-ray photoelectron spectroscopy and magnetic properties of Ce2Co15Mn3 compound

Olivier Isnard (1) , A. Popescu (2) , R. Dudric (2) , M. Coldea (2)

1 NEEL - MRS - Matériaux, Rayonnements, Structure
2 UBB - Babes-Bolyai University [Cluj-Napoca]

The magnetic properties of the Ce2Co15Mn3 compound has been investigated combining X-ray photoelectron spectroscopy (XPS) and magnetic measurements in the temperature range (4-850) K and magnetic field up to 10 T. X-ray powder diffraction (XRD) measurements showed that Ce2Co15Mn3 compound crystallizes in the Th2Zn17 structure type. XPS spectra pointed out the intermediate valence state of Ce ions and that both Co and Mn atoms carry magnetic moments. The compound Ce2Co15Mn3 has a ferromagnetic behavior below the Curie temperature T-C = 740 K with a saturation magnetization at 4 K of 22.7 mu B/f.u. The magnetic structure in Ce2Co15Mn3 is determined by the competition between the ferromagnetic (Co-Co, the dominant one) and antiferromagnetic (Co-Mn and Mn-Mn pairs) interactions.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Olivier Isnard, A. Popescu, R. Dudric, M. Coldea. X-ray photoelectron spectroscopy and magnetic properties of Ce2Co15Mn3 compound. Journal of Alloys and Compounds, 2012, 535, pp.10-14. ⟨10.1016/j.jallcom.2012.04.047⟩. ⟨hal-00989290⟩