Abstract Epitaxial La 0.67 Sr 0.33 MnO 3 thin films play important roles in several applications due to their half-metallic conductivity and high spin polarization. Since these properties are very sensitive to minor structural changes arising from slightly different growing conditions it is important to understand their effect on the electronic and magnetic properties of the resulting samples. Here, we study two sets of La 0.67 Sr 0.33 MnO 3 thin films, thicker (90 nm) and thinner (7 nm) ones, focusing on the influence of laser fluence and post-annealing oxygen partial pressure on their electronic structure and magnetism. Regardless of the preparation conditions, the thicker films present a tensile strain that leads to MnO 6 octahedral deformation as detected by Raman active modes. The thinner films exhibit sizable in-plane magnetic anisotropy which depends on the sample preparation that leads to distinct surface morphology and electronic properties ( Mn 4 + / Mn 3 + ratio).

中文翻译：

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SrTiO3(001)上生长的La0.67Sr0.33MnO3外延薄膜的磁性

摘要 外延La 0.67 Sr 0.33 MnO 3 薄膜由于其半金属导电性和高自旋极化而在多种应用中发挥着重要作用。由于这些特性对由略微不同的生长条件引起的微小结构变化非常敏感，因此了解它们对所得样品的电子和磁特性的影响非常重要。在这里，我们研究了两组 La 0.67 Sr 0.33 MnO 3 薄膜，较厚（90 nm）和较薄（7 nm）的薄膜，重点是激光能量密度和退火后氧分压对其电子结构和磁性的影响。无论制备条件如何，较厚的薄膜都呈现出导致 MnO 6 八面体变形的拉伸应变，如由拉曼活性模式检测到的。