Formation of AlxGa1−xSb films over GaSb substrates by Al diffusion C. M. Ruiz, N. P. Barradas, E. Alves, J. L. Plaza, V. Bermúdez and E. Diéguez Eur. Phys. J. Appl. Phys., 27 1-3 (2004) 423-426 Published online: 15 July 2004 DOI: 10.1051/epjap:2004130