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Influence of compressive strain on oxygen distribution in La0.7Ba0.3MnO3 thin films
被引:12
|作者:
Li, Bing
[1
]
Yang, Lei
[1
]
Tian, JinZeng
[1
]
Wang, XiaoPing
[1
]
Zhu, Hong
[1
]
Endo, Tamio
[2
]
机构:
[1] Univ Sci & Technol China, Dept Phys, Hefei 230026, Peoples R China
[2] Mie Univ, Grad Sch Engn, Tsu, Mie 5148507, Japan
关键词:
GIANT MAGNETORESISTANCE;
MAGNETIC-PROPERTIES;
MANGANESE OXIDE;
CATION DISORDER;
PHASE-DIAGRAM;
LA0.7CA0.3MNO3;
MANGANITES;
RESISTIVITY;
STOICHIOMETRY;
TEMPERATURE;
D O I:
10.1063/1.3573494
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
The effects of annealing ambient on the structural and transport properties of epitaxial La0.7Ba0.3MnO3 films suffering large compressive strain on LaAlO3 substrates (LBMO/LAO) have been investigated. Independent of oxygen or argon ambient, a high temperature (900 degrees C) post-annealing process leads to a c-axis contraction, which can be attributed to the oxygen transfer from the in-plane to the out-of-plane direction. Meanwhile, the transport properties are similar with each other for both the Ar-annealed and O-2-annealed films. The comparison of the ambient annealing effects between the highly strained LBMO/LAO films and negligibly strained LBMO films on SrTiO3 substrates indicates that a large in-plane compressive strain favors decreasing oxygen deficiency in the films, especially in the ab-plane. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3573494]
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