Tuning Fermi level within half-metallic gap in Co-based Heusler alloys W.Q. Li, J.X. Cao, J.W. Ding and X.H. Yan Eur. Phys. J. B, 85 7 (2012) 250 Published online: 23 July 2012 DOI: 10.1140/epjb/e2012-20881-0