Interface-driven phase separation in multifunctional materials: the case of GeMn ferromagnetic semiconductor - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2012

Interface-driven phase separation in multifunctional materials: the case of GeMn ferromagnetic semiconductor

Emmanuel Arras
  • Fonction : Auteur
  • PersonId : 871809
Frédéric Lançon
  • Fonction : Auteur
  • PersonId : 922047
Mauro Rovezzi
  • Fonction : Auteur
  • PersonId : 865704
Samuel Tardif
Francesco d'Acapito
  • Fonction : Auteur
  • PersonId : 864409
Joel Cibert
Pascal Pochet

Résumé

We use extensive first principle simulations to show the major role played by interfaces in the mechanism of phase separation observed in semiconductor multifunctional materials. We make an analogy with the precipitation sequence observed in over-saturated AlCu alloys, and replace the Guinier-Preston zones in this new context. A new class of materials, the $\alpha$ phases, is proposed to understand the formation of the coherent precipitates observed in the GeMn system. The interplay between formation and interface energies is analyzed for these phases and for the structures usually considered in the literature. The existence of the alpha phases is assessed with both theoretical and experimental arguments.
Fichier principal
Vignette du fichier
Arras-GeMn.pdf (3.35 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-00677840 , version 1 (09-03-2012)
hal-00677840 , version 2 (23-03-2012)

Identifiants

Citer

Emmanuel Arras, Frédéric Lançon, Ivetta Slipukhina, Éric Prestat, Mauro Rovezzi, et al.. Interface-driven phase separation in multifunctional materials: the case of GeMn ferromagnetic semiconductor. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2012, 85 (11), pp.115204. ⟨10.1103/PhysRevB.85.115204⟩. ⟨hal-00677840v2⟩
271 Consultations
459 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More