Effect of post-growth annealing on secondary phase formation in low-temperature-grown Mndoped GaAs

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

The microstructures of annealed GaAs layers containing 0.1%, 0.5% and 2% Mn are studied using aberration-corrected transmission electron microscopy (TEM). The layers were grown by molecular beam epitaxy at 270 ◦C. After heat treatment at 400, 560 and 630 ◦C, they are found to contain precipitate complexes of cubic or hexagonal (Mn, Ga) As, orthorhombic or rhombohedral As and voids. Information about the crystallographic structures and compositions of the phases is obtained using high-resolution TEM, scanning TEM and energy-dispersive x-ray spectroscopy. A phase diagram for secondary phase formation in annealed GaMnAs layers doped with low Mn concentrations is proposed.

Detaljer

Författare
  • Andras Kovacs
  • Janusz Sadowski
  • Takeshi Kasama
  • Martial Duchamp
  • Dunin-Borkowski Rafal
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Naturvetenskap
  • Fysik
Originalspråkengelska
Sidor (från-till)145309-145309-7
TidskriftJournal of Physics D: Applied Physics
Volym46
Utgåva nummer14
StatusPublished - 2013
PublikationskategoriForskning
Peer review utfördJa