Superconductivity in the iron-based F-doped layered quaternary compound Nd[ O1 - xFx] FeAsZhi-An Ren, Jie Yang, Wei Lu, Wei Yi, Xiao-Li Shen, Zheng-Cai Li, Guang-Can Che, Xiao-Li Dong, Li-Ling Sun, Fang Zhou and Zhong-Xian Zhao
National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences - P. O. Box 603, Beijing 100190, PRC
received 1 April 2008; accepted in final form 7 April 2008; published June 2008
published online 19 May 2008
Here we report a new quaternary iron-arsenide superconductor Nd[O1 - xFx] FeAs, with the onset resistivity transition at 51.9 K and Meissner transition at 51 K. This compound has the same crystal structure as LaOFeAs, and becomes the second superconductor after Pr[O1-xFx] FeAs that superconducts above 50 K.
74.10.+v - Occurrence, potential candidates.
74.70.Dd - Ternary, quaternary, and multinary compounds (including Chevrel phases, borocarbides, etc.).
© EPLA 2008