Ni doping effect and phase diagram of Ni-doped

✍ Scribed by Zhuan Xu; Qian Tao; Linjun Li; Jingqin Shen; Xiao Lin; Guanghan Cao

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 384 KB
• Volume: 470
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2009.10.054

✦ Synopsis

Transport properties of Ni-doped BaFe 2Àx Ni x As 2 single crystals have been investigated and the electronic phase diagram is derived. T c reaches 20 K at the optimal doping level x ¼ 0:10. There is a small doping range around x ¼ 0:055 where superconductivity and spin-density wave order coexist. The Hall coefficient shows a strong temperature dependence at the optimal doping level, suggesting non-Fermi liquid behavior.