Perovskite manganites La(CaSr)MnO have drawn the plentiful attention owing to their distinctive physical properties. Their unique properties make them an ideal candidate for high-sensitivity and uncooled bolometric applications. Optimized LaCaSrMnO (LCSMO) films were grown on (00) LaAlO substrate at different pre-sintering temperature () via sol–gel spin coating method. According to the test results of microstructure, internal strain, Mn ion valences and surface morphology, electrical transport properties are restricted by MnO octahedron distortion and film crystallinity affected by the change in . The microstructure growth was improved and the surface morphology tended to grow in a cross-like structure with high crystallinity by optimizing . Double exchange mechanism and internal strain were enhanced with the increase in . Thereby, due to the enlarging MnOMn bond angle and enhancing MnO covalency, the temperature () corresponding to temperature coefficient of resistivity () was increased gradually as increased. The value of LCSMO film reached a maximum value (10.82 %/K) and reached room temperature (302.03 K) at = 1123 K. The theoretical foundation of the pre-sintering effect has been supplemented, helping to understand the influence of pre-sintering on film growth and electrical transport properties.

中文翻译：

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旋涂法制备La0.7Ca0.18Sr0.12MnO3薄膜预烧结效果及电输运性能改善的理论模拟

钙钛矿型锰酸盐La(CaSr)MnO由于其独特的物理性质而引起了广泛的关注。其独特的特性使它们成为高灵敏度和非冷却测辐射热应用的理想选择。通过溶胶-凝胶旋涂法在不同的预烧结温度 () 下在 (00) LaAlO 衬底上生长优化的 LaCaSrMnO (LCSMO) 薄膜。根据微观结构、内应变、Mn离子价态和表面形貌的测试结果，电输运性能受到MnO八面体畸变的制约，薄膜结晶度受 变化的影响。通过优化，显微组织生长得到改善，表面形貌趋于以高结晶度的十字形结构生长。双交换机制和内应变随着 的增加而增强。由此，由于MnOMn键角增大和MnO共价性增强，电阻率温度系数()对应的温度()随着增加而逐渐增加。 LCSMO薄膜的值在= 1123 K时达到最大值（10.82 %/K）并达到室温（302.03 K）。补充了预烧结效应的理论基础，有助于理解预烧结的影响薄膜生长和电传输特性。