Poellath, S. and Lin, T. and Lei, N. and Zhao, W. and Zweck, J. and Back, C. H. (2020) Spin structure relation to phase contrast imaging of isolated magnetic Bloch and Neel skyrmions. ULTRAMICROSCOPY, 212: 112973. ISSN 0304-3991, 1879-2723
Full text not available from this repository. (Request a copy)Abstract
Magnetic skyrmions are promising candidates for future storage devices with a large data density. A great variety of materials have been found that host skyrmions up to the room-temperature regime. Lorentz microscopy, usually performed in a transmission electron microscope (TEM), is one of the most important tools for characterizing skyrmion samples in real space. Using numerical calculations, this work relates the phase contrast in a TEM to the actual magnetization profile of an isolated Neel or Bloch skyrmion, the two most common skyrmion types. Within the framework of the used skyrmion model, the results are independent of skyrmion size and wall width and scale with sample thickness for purely magnetic specimens. Simple rules are provided to extract the actual skyrmion configuration of pure Bloch or Neel skyrmions without the need of simulations. Furthermore, first differential phase contrast (DPC) measurements on Neel skyrmions that meet experimental expectations are presented and showcase the described principles. The work is relevant for material sciences where it enables the engineering of skyrmion profiles via convenient characterization.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ROOM-TEMPERATURE; LATTICE; Skyrmion; Lorentz TEM; Phase contrast; Magnetic imaging |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Josef Zweck |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Mar 2021 07:50 |
| Last Modified: | 26 Mar 2021 07:50 |
| URI: | https://pred.uni-regensburg.de/id/eprint/44659 |
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