Direct identification of interstitial Mn in heavily p-type doped GaAs and evidence of its high thermal stability

Journal Article · Mon May 16 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3592568· OSTI ID:21518440

Pereira, L M. C. ^[1]; Wahl, U; Correia, J G ^[2]; Decoster, S; Vantomme, A ^[3]; Silva, M R. da ^[4]; Araujo, J P ^[1]

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1. Department of Physics and Astronomy, IFIMUP and IN-Institute of Nanoscience and Nanotechnology, Faculdade de Ciencias da Universidade do Porto, 4169-007 Porto (Portugal)
2. Instituto Tecnologico e Nuclear, UFA, 2686-953 Sacavem (Portugal)
3. Instituut voor Kern-en Stralingsfysica and INPAC, K.U.Leuven, 3001 Leuven (Belgium)
4. Centro de Fisica Nuclear da Universidade de Lisboa, 1649-003 Lisboa (Portugal)

We report on the lattice location of Mn in heavily p-type doped GaAs by means of {beta}{sup -} emission channeling from the decay of {sup 56}Mn. The majority of the Mn atoms substitute for Ga and up to 31% occupy the tetrahedral interstitial site with As nearest neighbors. Contrary to the general belief, we find that interstitial Mn is immobile up to 400 deg. C, with an activation energy for diffusion of 1.7-2.3 eV. Such high thermal stability of interstitial Mn has significant implications on the strategies and prospects for achieving room temperature ferromagnetism in Ga{sub 1-x}Mn{sub x}As.

• OSTI ID: 21518440
• Journal Information: Applied Physics Letters, Vol. 98, Issue 20; Other Information: DOI: 10.1063/1.3592568; (c) 2011 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
ARSENIC COMPOUNDS
ATOMS
CRYSTAL STRUCTURE
DOPED MATERIALS
ELECTRON EMISSION
EMISSION
EV RANGE
FERROMAGNETIC MATERIALS
FERROMAGNETISM
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
INTERSTITIALS
MANGANESE 56
MANGANESE COMPOUNDS
SEMICONDUCTOR MATERIALS
STABILITY
TEMPERATURE RANGE 0273-0400 K
ARSENIDES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CRYSTAL DEFECTS
ENERGY
ENERGY RANGE
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOTOPES
MAGNETIC MATERIALS
MAGNETISM
MANGANESE ISOTOPES
MATERIALS
NUCLEI
ODD-ODD NUCLEI
PNICTIDES
POINT DEFECTS
RADIOISOTOPES
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS