Study of Ni80Fe20／Fe50Mn50 superlattice microstructures by transmission electron microscopy and x—ray diffraction

• 作者: MingXu TaoYang GuangmingLuo ZhengqiLu CuixiuLiu NingYang Zhenh
• 来源期刊: 北京同步辐射装置：英文版
• 学科: 物理学
• 关键词: Ni80Fe20/Fe50Mn50超晶格 X射线衍射分析 微观结构 电子输运
• 年，卷（期）: 2001,（2）
• 页码范围: 79-87
• 页数: 9页
• 分类号: O733.1

摘要

The detailed microstructures of Ni80Fe20/Fe50Mn50 superlattices have been characterized using both x-ray diffraction techniques and transmission electron microscopy.The obrivous layered structure,typical column structure and twins which exist in Ni80Fe20/Fe50Mn50 superlattices were observed through performing transmission microscopy.By combining the technique of lowangle x-ray reflectivity(specular and off-specular scans)with the anomalous scattering effect and high-angle x-ray diffraction(using conventional x-ray),wequantitatively analysed the microstructural variation as a function of annealing temperature.It is found that the lateral correlation length,the(111)peak intensity of the superlattices and the average multilayer coherence length all increase with a rise in annealing temperature annealing can decrease the rootmean-square roughness at the interfaces of Ni80Fe20/Fe50Mn50 superlattices.the obtained microstructural knowledge will be helpful in understanding the magnetic properties of the ni80Fe20/Fe50Mn50 exchange bias system.