  We report the discovery and characterization of a novel 112-type iron
pnictide EuFeAs2, with La-doping induced superconductivity in a series of
Eu1-xLaxFeAs2. The polycrystalline samples were synthesized through solid state
reaction method only within a very narrow temperature window around 1073 K.
Small single crystals were also grown from a flux method with the size about
100 um. The crystal structure was identified by single crystal X-ray
diffraction analysis as a monoclinic structure with space group of P21/m. From
resistivity and magnetic susceptibility measurements, we found that the parent
compound EuFeAs2 shows a Fe2+ related antiferromagnetic/structural phase
transition near 110 K and a Eu2+ related antiferromagnetic phase transition
near 40 K. La doping suppressed the both phase transitions and induced
superconducting transition with a Tc ~ 11 K for Eu0.85La0.15FeAs2.
