This title appears in the Scientific Report :
2022
Please use the identifier:
http://dx.doi.org/10.1016/j.jmmm.2021.168535 in citations.
Please use the identifier: http://hdl.handle.net/2128/31121 in citations.
Quantitative imaging of the magnetic field distribution in an artificial spin ice studied by off-axis electron holography
Quantitative imaging of the magnetic field distribution in an artificial spin ice studied by off-axis electron holography
The magnetic state, including the stray fields, of a chiral pattern of interacting permalloy nanomagnets is studied using off-axis electron holography in the transmission electron microscope. The projected in-plane magnetisation of the nanomagnets is reconstructed from the experimental magnetic phas...
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Personal Name(s): | Weßels, Teresa (Corresponding author) |
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Kovács, András (Corresponding author) / Gliga, Sebastian / Finizio, Simone / Caron, Jan / Dunin-Borkowski, Rafal E. | |
Contributing Institute: |
Physik Nanoskaliger Systeme; ER-C-1 |
Published in: | Journal of magnetism and magnetic materials, 543 (2022) S. 168535 - |
Imprint: |
Amsterdam
North-Holland Publ. Co.
2022
|
DOI: |
10.1016/j.jmmm.2021.168535 |
Document Type: |
Journal Article |
Research Program: |
Platform for Correlative, In Situ and Operando Characterization |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/31121 in citations.
The magnetic state, including the stray fields, of a chiral pattern of interacting permalloy nanomagnets is studied using off-axis electron holography in the transmission electron microscope. The projected in-plane magnetisation of the nanomagnets is reconstructed from the experimental magnetic phase shift using model-based iterative reconstruction. The thickness and chemical composition of the nanomagnets are characterised in cross-sectional geometry. The average value of the magnetic polarisation of the permalloy through the thickness of the sample is measured to be 0.73 T. This value is lower than the bulk value of 1 T, likely as a result of a combination of the microstructure, composition and possible oxidation of the nanomagnets. The experimental results are compared to micromagnetic simulations to confirm the magnetic states and to understand the switching processes in the magnetic nanoislands. |