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Superconductivity at 53.5 K in GdFeAsO 1−δ

2008; IOP Publishing; Volume: 21; Issue: 8 Linguagem: Inglês

10.1088/0953-2048/21/8/082001

1361-6668

Jie Yang, Zhengcai Li, Wei Lu, Wei Yi, Xiaoli Shen, Zhi‐An Ren, Guangcan Che, Xiaoli Dong, Liling Sun, Fang Zhou, Zhongxian Zhao,

Rare-earth and actinide compounds

Here we report the fabrication and superconductivity of the iron-based arsenic oxide GdFeAsO1−δ compound with oxygen-deficiency, which has an onset resistivity transition temperature at 53.5 K. This material has the same crystal structure as the newly discovered high-Tc ReFeAsO1−δ family (Re = rare earth metal) and a further reduced crystal lattice, while the Tc starts to decrease compared with the SmFeAsO1−δ system.