PyHoLo software, a new tool for electron hologram analysis and magnetic investigation

A new tool, PyHoLo software, was developed to help automate the process of determining magnetic field B from a series of holograms, registered at different environmental conditions (e.g. for upside and downside orientations of a sample in a specimen holder). This procedure involves translating single holograms into phase shift of electron wave, but also alignment of holograms (i.e. shift, rotation, magnification) and finally calculation of magnetic field in an area selected for investigation. PyHoLo gives functionality for performing all those steps without having to refer to different programs and tools. The workflow and results of this procedure are discussed using as an example sample of FeCuSiB.本研究研发了一款名为PyHoLo的软件工具，旨在实现基于多幅不同环境条件下记录的全息图像的磁场B测定流程的自动化，此类环境条件包括样品在样品架中朝上与朝下的不同取向场景。该流程涵盖三大核心步骤：首先将单幅全息图像转换为电子波相移，其次完成全息图像的配准（即位移、旋转、放大倍率调整），最终对选定的研究区域开展磁场计算。PyHoLo软件可集成上述所有步骤的操作功能，无需借助其他不同程序与工具即可完成全部流程。本研究以FeCuSiB合金样品作为示例，对该流程的工作流程与计算结果进行了探讨。