中国物理B ›› 2009, Vol. 18 ›› Issue (5): 2054-2057.doi: 10.1088/1674-1056/18/5/054

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Growth and transport features of electron-doped superconductor Pr1-xLaCexCuO4-δ thin films

高丽娟, 金魁, 赵力, 吴彬新, 李位勇, 朱北沂, 曹立新, 许波, 邱详冈, 赵柏儒   

  1. National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2008-10-29 修回日期:2008-11-12 出版日期:2009-05-20 发布日期:2009-05-20
  • 基金资助:
    Project supported by the State Key Program for Basic Research of China (Grant No 2004CB619004-1) and the National Natural Science Foundation of China (Grant No 10474121).

Growth and transport features of electron-doped superconductor Pr1-xLaCexCuO4-$\delta$ thin films

Gao Li-Juan(高丽娟), Jin Kui(金魁), Zhao Li(赵力), Wu Bin-Xin(吴彬新), Li Wei-Yong(李位勇), Zhu Bei-Yi(朱北沂), Cao Li-Xin(曹立新), Xu Bo(许波), Qiu Xiang-Gang(邱详冈), and Zhao Bai-Ru(赵柏儒)†   

  1. National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2008-10-29 Revised:2008-11-12 Online:2009-05-20 Published:2009-05-20
  • Supported by:
    Project supported by the State Key Program for Basic Research of China (Grant No 2004CB619004-1) and the National Natural Science Foundation of China (Grant No 10474121).

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摘要： T'-phase electron-doped superconductor Pr1-xLaCexCuO4 - δ (PLCCO) thin films are successfully prepared on SrTiO3 (100) substrates by using the dc magnetron sputtering method. It is found that the films each have a highly oriented structure along the c-axis. For optimally doped films with x ≈ 0.10, the superconducting transition temperature Tc is 23.5~K, which is similar to that of a single crystal. The quadratic temperature dependence of the resistivity is observed when T>Tc, which can be attributed to the two-dimensional Fermi liquid behaviour. Besides, the optimal conditions for preparing the T'-phase PLCCO thin films are also discussed in detail.

关键词: electron-doped cuprate, Pr1-xLaCexCuO4 -$\delta$, thin film, magnetron sputtering

Abstract: T$'$-phase electron-doped superconductor Pr$_{1 -x}$LaCe$_{x}$CuO$_{4 - \delta }$ (PLCCO) thin films are successfully prepared on SrTiO$_{3}$ (100) substrates by using the dc magnetron sputtering method. It is found that the films each have a highly oriented structure along  the $c$-axis. For optimally doped films with $x \approx 0.10$, the superconducting transition temperature $T_{\rm c}$ is 23.5 K, which is similar to that of a single crystal. The quadratic temperature dependence of the  resistivity is observed when $T>T_{\rm c}$, which can be attributed to the two-dimensional Fermi liquid behaviour. Besides, the optimal conditions for preparing the T$'$-phase PLCCO thin films are also discussed in detail.

Key words: electron-doped cuprate, Pr1-xLaCexCuO4 -$\delta$, thin film, magnetron sputtering

中图分类号: 

  • 74.78.Bz
74.62.Dh (Effects of crystal defects, doping and substitution) 81.15.Cd (Deposition by sputtering) 74.20.Mn (Nonconventional mechanisms)