Artifacts in magnetic spirals retrieved by transport of intensity equation (TIE)
J. Cui, Y. Yao, X. Shen, Y. G. Wang, R. C. Yu (Beijing National, Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy, of Sciences, Beijing, School of Physical Sciences, University of Chinese, Academy of Science Beijing)
TL;DR
This paper analyzes artifacts in magnetic structure reconstructions from LTEM images using TIE, highlighting how improper parameters and specimen tilting can introduce false features and complicate interpretation.
Contribution
It provides a detailed analysis of artifacts in TIE-based magnetic structure reconstruction and discusses how experimental parameters affect image accuracy.
Findings
Improper TIE parameters can cause false features in reconstructed images.
Specimen tilting complicates magnetic structure analysis due to projection effects.
Artifacts are linked to high frequency overestimation and projection issues.
Abstract
The artifacts in the magnetic structures reconstructed from Lorentz transmission electron microscopy (LTEM) images with TIE method have been analyzed in detail. The processing for the simulated images of Bloch and Neel spirals indicated that the improper parameters in TIE may overestimate the high frequency information and induce some false features in the retrieved images. The specimen tilting will further complicate the analysis of the images because the LTEM image contrast is not the result of the magnetization distribution within the specimen but the integral projection pattern of the magnetic induction filling the entire space including the specimen.
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