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Preparation and properties of bilayer manganite films

机译：双层锰矿薄膜的制备与性能

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A bilayer manganite film La2-2xSr1 + 2xMn2O7 (X = 0.32) was successfully prepared by pulsed laser deposition. By controlling the parameters of deposition, the fabricated films are of single phase and grown well on two kinds of substrates with different lattice constants. It is found that there is 80degreesK difference between T-MI of the two films grown on SrTiO (0 0 1) and NdGaO (1 1 0). At the same time, the resistivity of the film on SrTiO (0 0 1) is 50 times higher than that of the film on NdGaO (1 1 0). We studied the influence of the interface strain and it turns out that the lattice mismatch between substrate and film is the main reason for the above observations. Tensile strain decreases TM, with increasing resistivity, and compressive strain has the opposite effect. Using the double-exchange model of Zener, these results can be explained qualitatively. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 15]
机译：通过脉冲激光沉积成功制备了双层锰膜La2-2xSr1 + 2xMn2O7（X = 0.32）。通过控制沉积参数，制成的膜是单相的，并且可以在两种具有不同晶格常数的基板上很好地生长。发现在SrTiO（0 0 1）和NdGaO（1 1 0）上生长的两层薄膜的T-MI之间存在80°K的差异。同时，SrTiO（0 0 1）上的膜的电阻率是NdGaO（1 1 0）上的膜的电阻率的50倍。我们研究了界面应变的影响，结果发现衬底和薄膜之间的晶格失配是上述观察的主要原因。拉伸应变随着电阻率的增加而降低TM，而压缩​​应变则具有相反的作用。使用齐纳双交换模型，可以定性地解释这些结果。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：15]

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