Single crystal growth and superconductivity of Ca(Fe1-xCox)2As2
  We report the single crystal growth of Ca(Fe1-xCox)2As2 (0 <= x <= 0.082) from Sn flux. The temperature-composition phase diagram is mapped out based on the magnetic susceptibility and electrical transport measurements. Phase diagram of Ca(Fe1-xCox)2As2 is qualitatively different from those of Sr and Ba, it could be due to both the charge doping and structural tuning effects associated with Co substitution. 
Rongwei Hu, Sheng Ran, S. L. Bud'ko, W. E. Straszheim, P. C. Canfield
cond-mat.supr-con