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)†
National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
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.
Received: 29 October 2008
Revised: 12 November 2008
Accepted manuscript online:
Fund: 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).
Cite this article:
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) Growth and transport features of electron-doped superconductor Pr1-xLaCexCuO4-$\delta$ thin films 2009 Chin. Phys. B 18 2054
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