Evolution of microstructure, strain and physical properties in oxide nanocomposite films.

Evolution of microstructure, strain and physical properties in oxide nanocomposite films.
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DOI:
10.1038/srep05426
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发表时间:
2014-06-24
期刊:
影响因子:
4.6
通讯作者:
Jia Q
Jia Q
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Chen A;Weigand M;Bi Z;Zhang W;Lü X;Dowden P;MacManus-Driscoll JL;Wang H;Jia Q

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我们以LSMO:ZnO纳米复合薄膜为模型体系,研究了薄膜厚度对纳米复合材料物理性能的影响。结果表明,薄膜的应变、微结构以及磁电阻都强烈依赖于薄膜厚度。的磁输运性质已被拟合由一个修改后的并联通道模型,这是在蓝宝石衬底上的纳米复合膜的膜厚度的函数的微结构演变的协议。应变分析表明,LAO上纳米复合薄膜的物理性能变化主要受应变效应的影响。这些结果证实了薄膜厚度对微结构、应变状态和功能的关键作用。它进一步表明,人们可以使用膜厚度作为一个关键参数来设计具有最佳功能的纳米复合材料。
We, using LSMO:ZnO nanocomposite films as a model system, have studied the effect of film thickness on the physical properties of nanocomposites. It shows that strain, microstructure, as well as magnetoresistance strongly rely on film thickness. The magnetotransport properties have been fitted by a modified parallel connection channel model, which is in agreement with the microstructure evolution as a function of film thickness in nanocomposite films on sapphire substrates. The strain analysis indicates that the variation of physical properties in nanocomposite films on LAO is dominated by strain effect. These results confirm the critical role of film thickness on microstructures, strain states, and functionalities. It further shows that one can use film thickness as a key parameter to design nanocomposites with optimum functionalities.
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