| Structural and physical properties of undoped and nickel-doped BaFe2-xNixAs2（x = 0,0.04） single crystals |
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| 引用本文： | 李正才,陆伟,董晓莉,周放,赵忠贤.Structural and physical properties of undoped and nickel-doped BaFe2-xNixAs2（x = 0,0.04） single crystals[J].中国物理 B,2010,19(8):86101-086101. |
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| 作者姓名： | 李正才 陆伟 董晓莉 周放 赵忠贤 |
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| 作者单位： | National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China |
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| 基金项目： | Project supported by the State Key Development Program for Basic Research of China (Grant No. 2006CB601002) and the National Natural Science Foundation of China (Grant Nos. 10734120 and 10874211). |
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| 摘 要： | <正>Single crystals of undoped and nickel-doped BaFe_(2-x)Ni_xAs_2(x=0,0.04) have been grown by FeAs self-flux method.The maximum dimension of the crystal is as large as ~ 1 cm along the ab plane.The crystalline topography of a cleaved crystal surface is examined by scanning electron microscope(SEM).By x-ray powder diffraction(XRD) experiments using pure silicon as an internal standard,precise unit cell parameters(tetragonal at room temperature) are determined:a = 3.9606(4) A(1 A=0.1 nm),c = 13.015(2) A for BaFe_(1.96)Ni_(0.04)As_2 and a = 3.9590(5) A,c = 13.024(1) A for BaFe_2As_2.DC magnetization and transport measurements are performed to check superconducting transition(T_c=15 K for x=0.04) and other subtle anomalies.For BaFe_(0.96)Ni_(0.04)As_2 crystal,the resistance curve at normal state shows two distinct anomalies associated with spin and structure transitions,and its magnetization data above ~ 91 K exhibit a linear temperature dependence due to spin density wave(SDW) instability.
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| 关 键 词： | BaFe2-xNixAs2 single crystal superconductivity x-ray diffraction |
| 收稿时间： | 2010-05-13 |
Structural and physical properties of undoped and nickel-doped BaFe2-xNixAs2(x=0, 0.04) single crystals |
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| Li Zheng-Cai,Lu Wei,Dong Xiao-Li,Zhou Fang and Zhao Zhong-Xian.Structural and physical properties of undoped and nickel-doped BaFe2-xNixAs2(x=0, 0.04) single crystals[J].Chinese Physics B,2010,19(8):86101-086101. |
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| Authors: | Li Zheng-Cai Lu Wei Dong Xiao-Li Zhou Fang and Zhao Zhong-Xian |
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| Institution: | National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | Single crystals of undoped and nickel-doped BaFe2 - xNixAs2 (x=0, 0.04) have been grown by FeAs self-flux method. The maximum dimension of the crystal is as large as ～ 1 cm along the ab plane. The crystalline topography of a cleaved crystal surface is examined by scanning electron microscope (SEM). By x-ray powder diffraction (XRD) experiments using pure silicon as an internal standard, precise unit cell parameters (tetragonal at room temperature) are determined: a=3.9606(4) AA (1 AA=0.1 nm), c=13.015(2) AA for BaFe1.96Ni0.04As2 and a=3.9590(5) AA, c=13.024(1) AA for BaFe2As2. DC magnetization and transport measurements are performed to check superconducting transition (Tc=15 K for x=0.04) and other subtle anomalies. For BaFe1.96Ni0.04As2 crystal, the resistance curve at normal state shows two distinct anomalies associated with spin and structure transitions, and its magnetization data above ～ 91 K exhibit a linear temperature dependence due to spin density wave (SDW) instability. |
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| Keywords: | BaFe2-xNixAs2 single crystal superconductivity x-ray diffraction |
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