The electric and magnetic properties of epitaxially grown A0.5-xLaxSr0.5MnO3 (A=Pr, Nd) thin film
Yang Shao-Bo(杨少波)a)b), Zhong Jian-Ping(钟建平)b), Yuan Jie(袁洁)b), Zhu Shao-Jiang(朱少将)b), Xu Bo(许波)b), Cao Li-Xin(曹立新)b), Qiu Xiang-Gang(丘祥刚)b), Nie Liu-Ying(聂六英)a), Xie Zhong(谢中)a), Zhao Li-Hua(赵立华)a), and Zhao Bai-Ru(赵柏儒)a)b)†
a College of Material Science and Engineering, Hunan University, Changsha, China; b National Laboratory for Superconductivity, Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China
Abstract The epitaxial (single crystal-like) Pr$_{0.4}$La$_{0.1}$Sr$_{0.5}$MnO$_{3}$ (PLSMO) and Nd$_{0.35}$La$_{0.15}$Sr$_{0.5}$MnO$_{3}$ (NLSMO) thin films are prepared and characterized, and the electric and magnetic properties are examined. We find that both PLSMO and NLSMO have their own optimum deposition temperature ($T_{\rm o})$ in their growing into epitaxial thin films. When the deposition temperature is higher than $T_{\rm o}$, a $c$-axis oriented but polycrystalline thin film grows; when the deposition temperature is lower than $T_{\rm o}$, the thin film tends to be $a$-axis oriented and also polycrystalline. The most important point is that for the epitaxial PLSMO and NLSMO thin films the electronic phase transitions are closely consistent with the magnetic phase transitions, i.e. an antiferromagnetic phase corresponds to an insulating state, a ferromagnetic phase corresponds to a metallic state and a paramagnetic phase corresponds to a semiconducting state, while for the polycrystalline thin films the electronic phase transitions are always not consistent with the magnetic transitions.
Received: 07 March 2006
Revised: 21 June 2006
Accepted manuscript online:
Fund: Project supported by the State Key Development Program for Basic
Research of China (Grant No TG1998061406) and the\linebreak
\makebox[1.6mm]{}National Natural Science Foundation of China (Grant
No
90206019).
Cite this article:
Yang Shao-Bo(杨少波), Zhong Jian-Ping(钟建平), Yuan Jie(袁洁), Zhu Shao-Jiang(朱少将), Xu Bo(许波), Cao Li-Xin(曹立新), Qiu Xiang-Gang(丘祥刚), Nie Liu-Ying(聂六英), Xie Zhong(谢中), Zhao Li-Hua(赵立华), and Zhao Bai-Ru(赵柏儒) The electric and magnetic properties of epitaxially grown A0.5-xLaxSr0.5MnO3 (A=Pr, Nd) thin film 2006 Chinese Physics 15 2724
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