Raw data band gap tuning by structural phase transition in Sm-substituted BiFeO3 powders

The following raw data are the basis of the paper "band gap tuning by structural phase transition in Sm-substituted BiFeO3 powders". The Raman spectra were measured with a LabRam system from Horiba with 633nm laser, a laser power of 1mW and a laser spot size of 1.2um in diameter. The diffuse reflectance in the UV-visible range were measured with a PerkinElmer Lambda 850 equipped with a Harrick Praying Mantis diffuse reflectance acessory. The diffuse reflectance was measured across the phase transition for increasing- and decreasing-temperature runs up to 800K for all Sm compositions.以下原始数据构成了论文《钐（Sm）掺杂BiFeO3粉体的结构相变带隙调控》的研究基础。 拉曼光谱（Raman spectra）采用堀场（Horiba）公司的LabRam系统进行测试，测试所用激光波长为633nm，激光功率为1mW，光斑直径为1.2μm。紫外-可见光波段的漫反射光谱采用珀金埃尔默（PerkinElmer）Lambda 850分光光度计进行测试，该设备搭载了哈里克（Harrick）Praying Mantis型漫反射附件。针对所有钐（Sm）掺杂配比的样品，我们在升、降温过程中覆盖相变温区开展了测试，测试最高温度可达800K。