Soft X-ray absorption spectroscopy investigations of Bi6FeCoTi3O18 and LaBi5FeCoTi3O18 epitaxial thin films
Soft X-ray absorption spectroscopy investigations of Bi6FeCoTi3O18 and LaBi5FeCoTi3O18 epitaxial thin films
复制标题
Bi6FeCoTi3O18 和 LaBi5FeCoTi3O18 外延薄膜的软 X 射线吸收光谱研究
DOI：
10.1063/1.4961392
复制
发表时间：
2016-08-28
影响因子：
3.2
通讯作者：
Lu, Yalin
中科院分区：
文献类型：
--
作者：
Cui, Zhangzhang;Xu, Hui;Lu, Yalin
采用脉冲激光沉积法制备了高质量的单晶Bi6FeCoTi3O18和LaBi5FeCoTi3O18薄膜。X射线衍射分析表明，LaBi5FeCoTi3O18薄膜具有更无序的晶格结构。磁性测量结果表明，在LaBi5FeCoTi3O18薄膜的铁磁性显着增强。用软X射线吸收谱研究了La取代Bi对氧化态和杂化态的调制。光谱结果表明，LaBi5FeCoTi3O18薄膜中氧空位浓度降低，晶格结构更加扭曲，从而解释了铁磁性增强的原因。
High-quality single-crystalline Bi6FeCoTi3O18 and LaBi5FeCoTi3O18 thin films were prepared by pulsed laser deposition. X-ray diffraction characterizations indicate a more disordered lattice structure of the LaBi5FeCoTi3O18 film. The magnetic measurement results demonstrated significantly enhanced ferromagnetism in the LaBi5FeCoTi3O18 film. The modulation of oxidation and hybridization states caused by substituting Bi with La was studied using the soft X-ray absorption spectroscopy. The spectroscopic results revealed the reduced concentration of oxygen vacancies and the more distorted lattice structure in the LaBi5FeCoTi3O18 film, which explained the enhanced ferromagnetism.