Ferromagnetic nanoclusters in Si:Mn and GaMnAs annealed at high temperature-pressure - J. Bak-Misiuk; P. Romanowski; J. Domagala; A. Misiuk; E. Dynowska; E. Lusakowska; A. Barcz; J. Sadowski; W. Caliebe (High Pressure Physics and Engineering, 2009)