TY  - JOUR
AU  - Weßels, Teresa
AU  - Kovács, András
AU  - Gliga, Sebastian
AU  - Finizio, Simone
AU  - Caron, Jan
AU  - Dunin-Borkowski, Rafal E.
TI  - Quantitative imaging of the magnetic field distribution in an artificial spin ice studied by off-axis electron holography
JO  - Journal of magnetism and magnetic materials
VL  - 543
SN  - 0304-8853
CY  - Amsterdam
PB  - North-Holland Publ. Co.
M1  - FZJ-2022-00124
SP  - 168535 -
PY  - 2022
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000710711300007
DO  - DOI:10.1016/j.jmmm.2021.168535
UR  - https://juser.fz-juelich.de/record/904794
ER  -