Structural and magnetic properties of Mn5Ge3 nanoclusters dispersed in MnxGe1−x/Ge(0 0 1)2 × 1 diluted magnetic semiconductors
- de Padova, P.
- Favre, Luc
- Berbezier, Isabelle
- Olivieri, B.
- Paci, B.
- Rossi Albertini, V.
- Perfetti, P.
- Quaresima, C.
- Mariot, J.-M.
- Taleb-Ibrahimi, A.
- Richter, M.C.
- Heckmann, O.
- D’orazio, F.
- Lucari, F.
- Hricovini, K.
DOIAbstract
International audienceWe investigated the structural and magnetic properties of MnxGe1−x, with 0.02 ⩽ x ⩽ 0.1. The MnxGe1−x samples were grown on Ge(0 0 1)2 × 1 by molecular beam epitaxy, at a substrate temperature of 520 K. The samples were characterized in situ by reflection high-energy electron diffraction and ex situ by high-resolution transmission electron microscopy, energy dispersive X-ray reflectivity and magneto-optical Kerr effect. From microscopy images we evidenced on all samples the presence of Mn5Ge3 nanocrystallites in addition to the MnxGe1−x diluted magnetic semiconductor with an estimated Mn concentration x ≈ 1.5%. The size and the density of the Mn5Ge3 precipitates we...
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