Phase contrast imaging of non-collinear spin textures with Lorentz microscopy
Phase contrast imaging of non-collinear spin textures with Lorentz microscopy
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DOI：
10.1557/s43578-023-01216-1
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发表时间：
2023-11
影响因子：
2.7
通讯作者：
R. Streubel
中科院分区：
文献类型：
--
作者：
R. Streubel
本文讨论了物理和数学背景的相位衬度成像与同轴电子全息术从物理学，而不是从显微镜的角度来看，并展示了非迭代和迭代的方法的强度，通过应用到磁性研究。由于电磁相互作用与物质和电子波传播的磁和电相移的全面推导提出了作为相位恢复算法的基础上的强度传输方程和Gerchberg-Saxton-一个迭代的出口波重建算法。这两种算法的强度和潜力突出的实验和数值定量比较使用非共线自旋纹理。虽然这项工作的重点是磁性研究，无关紧要的出口波重建相移的起源，确保适用于研究量子，能量和磁性材料中的电和自旋分布的空间变化。
This article discusses the physical and mathematical background of phase contrast imaging with in-line electron holography from a physics rather than a microscopy perspective and showcases the strength of non-iterative and iterative approaches by application to magnetism research. A comprehensive derivation of magnetic and electric phase shift due to electromagnetic interaction with matter and electron wave propagation is presented as the foundation for phase retrieval algorithms based on the transport-of-intensity equation and Gerchberg–Saxton—an iterative exit wave reconstruction algorithm. The strength and potential of both algorithms are highlighted by experimental and numerical quantitative comparison using non-collinear spin textures. Although the focus of this work is on magnetism research, the indifference of the exit wave reconstruction to the origin of the phase shift ensures applicability to study spatial variations in both electric and spin distributions in quantum, energy, and magnetic materials.