中国物理B ›› 2010, Vol. 19 ›› Issue (2): 26103-026103.doi: 10.1088/1674-1056/19/2/026103
李正才, 陆伟, 董晓莉, 周放, 赵忠贤
Li Zheng-Cai(李正才), Lu Wei(陆伟), Dong Xiao-Li(董晓莉), Zhou Fang(周放)† , and Zhao Zhong-Xian(赵忠贤)
摘要: A series of big single crystals of BaFeFe2-xNixAs2 have been prepared by the FeAs self-flux method, with nominal nickel doping x = 0--0.12. The dimensions of the cleaved crystals are over 10~mm along ab plane and ~ 2~mm in maximum along the c direction. The measurements of x-ray diffraction, electrical resistance and magnetic property are carried out on the crystals. For the undoped parent compound BaFe2As2, both resistance and magnetization data display an anomaly associated with spin density wave and/or structural phase transition, with the transition temperatures at ~ 138~K. For Ni-doped BaFe2-xNixAs2 crystals, the superconducting critical temperature Tc ranges from 4.3~K for x=0.06 sample to 20~K for the optimally doped x=0.10 crystal.
中图分类号: (Magnetic properties including vortex structures and related phenomena)