Resolution Increase and Faster Phase Identification for Electron Magnetic Imaging

A detailed imaging of magnetic skyrmion arrangement allows us to understand the interactions in them and their dynamics, which can pave the way to the low power spintronics device [1]. Lorentz Transmission Electron Microscopy is an effective way for imaging the internal magnetic properties of a material [2]. The phase shift of the electron beam has a relationship with the magnetization distribution of the nanostructure that is based on Aharonov-Bohm Effect. Here, we are using several methods to get the electron phase shift caused by the complex magnetization distribution. We then reconstructed the magnetization using a model based iterative algorithm [3]. For getting an accurate magnetization distribution, cost function minimization analysis was done. We then compared the accuracy of the reconstructed magnetization from the electron phase shift from different forward process. Here, our methods reduce the artifacts that are usually seen in magnetization reconstruction process.

[1] Fert, Nat Nano (2013)
[2] Yu, Nat Matt (2011)
[3] Kovács, APL (2017)