Possible superconductivity above 25 K in single crystalline Co-doped BaFe${}_2$As${}_2$

Yasuyuki Nakajima, Toshihiro Taen, Tsuyoshi Tamegai

We present superconducting properties of single crystalline Ba(Fe${}_{0.9}$Co${}_{0.1}$)${}_2$As${}_2$ by measuring magnetization, resistivity, upper critical field, Hall coefficient,…