High Pressure X-ray Absorption Spectroscopy on Zni_xMnxO (x=0.25 and x=0.05) at the Mn K Edge

J.P. Itié (1) , A.M. Flank (1) , P. Lagarde (1) , J. Pellicer-Porres (2) , J.A. Sans (2) , J. F. Sanchez-Royo (2) , A. Segura (2) , A. Polian (3)

1 SSOLEIL - Synchrotron SOLEIL
2 ICMUV - Institut Universitari de Ciencia dels Materials
3 IMPMC - Institut de minéralogie et de physique des milieux condensés

X-ray absorption measurements have been performed on Zn!_xMnxO (x=.25 and x=.05) at the Mn K edge under pressure. Mn is in substitution of Zn whatever the composition or the structure. A phase transformation from wurtzite to rocksalt is observed close to 8 GPa for both compositions. The local compressibility around the Mn atom is similar to the bulk one, in the wurtzite and in the rocksalt phases. The transition is reversible for x=0.05 but irreversible for x=0.25.

Mots clés: High pressure; diluted magnetic semi-conductor

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

J.P. Itié, A.M. Flank, P. Lagarde, J. Pellicer-Porres, J.A. Sans, et al.. High Pressure X-ray Absorption Spectroscopy on Zni_xMnxO (x=0.25 and x=0.05) at the Mn K Edge. American Institute of Physics, 2007, pp.372. ⟨hal-00133525⟩