The half-metallic ferromagnet Co2Mn0.5Fe0.5Si
  Electronic structure calculation were used to predict a new material for spintronic applications. Co2Mn0.5Fe0.5Si is one example which is stable against on-site correlation and disorder effects due to the position of the Fermi energy in the middle of the minority band gap. Experimentally the sample were made exhibiting L21 structure and a high magnetic order. 
Benjamin Balke, Hem C. Kandpal, Gerhard H. Fecher, and Claudia Felser