Wang Hailin, Frontera Carlos, Martínez Benjamín, Mestres Narcís
Institut de Ciència de Materials de Barcelona, ICMAB, Consejo Superior de Investigaciones Científicas, CSIC, Campus UAB, 08193 Bellaterra, Barcelona, Spain.
Materials (Basel). 2020 Nov 4;13(21):4966. doi: 10.3390/ma13214966.
The annealing process is an important step common to epitaxial films prepared by chemical solution deposition methods. It is so because the final microstructure of the films can be severely affected by the precise features of the thermal processing. In this work we analyze the structural and magnetic properties of double perovskite LaCoMnO and LaNiMnO epitaxial thin films prepared by polymer-assisted deposition (PAD) and crystallized by rapid thermal annealing (RTA). It is found that samples prepared by RTA have similar values of saturation magnetization and Curie temperature to their counterparts prepared by using conventional thermal annealing (CTA) processes, thus indicating low influence of the heating rates on the B-B' site cationic ordering of the ABB'O double perovskite structure. However, a deeper analysis of the magnetic behavior suggested some differences in the actual microstructure of the films.
退火过程是通过化学溶液沉积法制备外延薄膜时常见的重要步骤。之所以如此，是因为薄膜的最终微观结构会受到热处理精确特征的严重影响。在这项工作中，我们分析了通过聚合物辅助沉积（PAD）制备并通过快速热退火（RTA）结晶的双钙钛矿LaCoMnO和LaNiMnO外延薄膜的结构和磁性。结果发现，通过RTA制备的样品与使用传统热退火（CTA）工艺制备的样品具有相似的饱和磁化强度值和居里温度，这表明加热速率对ABB'O双钙钛矿结构的B - B'位阳离子有序化影响较小。然而，对磁性行为的深入分析表明，薄膜的实际微观结构存在一些差异。
