Superconductivity in SmFe1-xMxAsO (M = Co, Rh, Ir) Yan-Peng Qi, Lei Wang, Zhao-Shun Gao, Dong-Liang Wang, Xian-Ping Zhang, Zhi-Yu Zhang and Yan-Wei Ma EPL, 89 6 (2010) 67007 Published online: 19 April 2010 DOI: 10.1209/0295-5075/89/67007