Dilute magnetic semiconductors (DMSs) are widely studied but the inhomogeneous in DMS are seldom investigated. The spinodal decomposition phase is showed to offer the possibility to have high Curie temperature [1]. Under layer and layer crystal growth conditions spinodal decomposition in DMS leads to characterise quasi-one-dimentional nanostucture in which high TC ferromagnetism is observed. [2] Moreover experimental studies on inhomogeneous systems such as (Zn,Cr)Te films or Ge1-xMnx nanocolumns... showed that these materials, the formation of which can be manipulated by growth conditions, offer very attactive and potential magnetic properties up to above room temperature.[3,4]

• [1] K. Sato et al., Japanese Journal of Applied Physics, Vol 44, No.30, 2005, L948 L951 [2] T. Fukushima et al., Japanese Journal of Applied Physics, Vol 45, No. 15, 2006, L416 L418 [3] S. Kuroda et al., Nature Materials 6, 2007, 440 446 [4] M. Jamet et al., Nature Materials 5, 2006, 653 659