Model-based magnetization retrieval from holographic phase images. Röder, F., Vogel, K., Wolf, D., Hellwig, O., Wee, S. H., Wicht, S., & Rellinghaus, B. Ultramicroscopy, 176:177–187, May, 2017. ![Model-based magnetization retrieval from holographic phase images [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex The phase shift of the electron wave is a useful measure for the projected magnetic flux density of magnetic objects at the nanometer scale. More important for materials science, however, is the knowledge about the magnetization in a magnetic nano-structure. As demonstrated here, a dominating presence of stray fields prohibits a direct interpretation of the phase in terms of magnetization modulus and direction. We therefore present a model-based approach for retrieving the magnetization by considering the projected shape of the nano-structure and assuming a homogeneous magnetization therein. We apply this method to FePt nano-islands epitaxially grown on a SrTiO3 substrate, which indicates an inclination of their magnetization direction relative to the structural easy magnetic [001] axis. By means of this real-world example, we discuss prospects and limits of this approach.
@article{roder_model-based_2017,
series = {70th {Birthday} of {Robert} {Sinclair} and 65th {Birthday} of {Nestor} {J}. {Zaluzec} {PICO} 2017 – {Fourth} {Conference} on {Frontiers} of {Aberration} {Corrected} {Electron} {Microscopy}},
title = {Model-based magnetization retrieval from holographic phase images},
volume = {176},
issn = {0304-3991},
url = {https://www.sciencedirect.com/science/article/pii/S0304399116303047},
doi = {10.1016/j.ultramic.2016.11.003},
abstract = {The phase shift of the electron wave is a useful measure for the projected magnetic flux density of magnetic objects at the nanometer scale. More important for materials science, however, is the knowledge about the magnetization in a magnetic nano-structure. As demonstrated here, a dominating presence of stray fields prohibits a direct interpretation of the phase in terms of magnetization modulus and direction. We therefore present a model-based approach for retrieving the magnetization by considering the projected shape of the nano-structure and assuming a homogeneous magnetization therein. We apply this method to FePt nano-islands epitaxially grown on a SrTiO3 substrate, which indicates an inclination of their magnetization direction relative to the structural easy magnetic [001] axis. By means of this real-world example, we discuss prospects and limits of this approach.},
language = {en},
urldate = {2021-12-26},
journal = {Ultramicroscopy},
author = {Röder, Falk and Vogel, Karin and Wolf, Daniel and Hellwig, Olav and Wee, Sung Hun and Wicht, Sebastian and Rellinghaus, Bernd},
month = may,
year = {2017},
keywords = {FePt nano-structured film, Magnetic imaging, Off-axis electron holography},
pages = {177--187},
}
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