Speaker
Alexander Edström
(ETH Zurich)
Description
In recent years it has been shown that electric fields in solids can be imaged, with sub-atomic resolution, using scanning transmission electron microscopy (STEM) and differential phase contrast imaging techniques. Here we use a Pauli equation based multislice method [Phys. Rev. Lett. 116, 127203 (2016)] to investigate the possibilities of imaging also microscopic magnetic fields with such STEM techniques. Considering an example of a hard ferromagnetic material FePt, We illustrate how sub-atomic resolution images of the microscopic magnetic fields can be extracted for thin samples and suitable electron beam conditions. We discuss related possibilities and limitations, and aspects regarding data interpretation.
Authors
Alexander Edström
(ETH Zurich)
Dr
Axel Lubk
(Institute for Solid State and Materials Physics, TU Dresden)
Dr
Jan Rusz
(Uppsala University )
