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@ARTICLE{Feggeler:904872,
author = {Feggeler, Thomas and Meckenstock, Ralf and Spoddig, Detlef
and Zingsem, Benjamin and Ohldag, Hendrik and Wende, Heiko
and Farle, Michael and Winklhofer, Michael and Ollefs,
Katharina J.},
title = {{S}patially resolved {GH}z magnetization dynamics of a
magnetite nano-particle chain inside a magnetotactic
bacterium},
journal = {Physical review research},
volume = {3},
number = {3},
issn = {2643-1564},
address = {College Park, MD},
publisher = {APS},
reportid = {FZJ-2022-00188},
pages = {033036},
year = {2021},
abstract = {Understanding magnonic properties of nonperiodic magnetic
nanostructures requires real-space imaging of ferromagnetic
resonance modes with spatial resolution well below the
optical diffraction limit and sampling rates in the 5–100
GHz range. Here, we demonstrate element-specific scanning
transmission x-ray microscopy-detected ferromagnetic
resonance (STXM-FMR) applied to a chain of dipolarly coupled
Fe3O4 nano-particles (40–50 nm particle size) inside a
single cell of a magnetotactic bacterium Magnetospirillum
magnetotacticum. The ferromagnetic resonance mode of the
nano-particle chain driven at 6.748 GHz and probed with 50
nm x-ray focus size was found to have a uniform phase
response but non-uniform amplitude response along the chain
segments due to the superposition of dipolar coupled modes
of chain segments and individual particles, in agreement
with micromagnetic simulations.},
cin = {ER-C-1},
ddc = {530},
cid = {I:(DE-Juel1)ER-C-1-20170209},
pnm = {5351 - Platform for Correlative, In Situ and Operando
Characterization (POF4-535) / DFG project 405553726 - TRR
270: Hysterese-Design magnetischer Materialien für
effiziente Energieumwandlung (405553726)},
pid = {G:(DE-HGF)POF4-5351 / G:(GEPRIS)405553726},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000671591900004},
doi = {10.1103/PhysRevResearch.3.033036},
url = {https://juser.fz-juelich.de/record/904872},
}