This title appears in the Scientific Report :
2022
Please use the identifier:
http://hdl.handle.net/2128/30671 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevResearch.3.033036 in citations.
Spatially resolved GHz magnetization dynamics of a magnetite nano-particle chain inside a magnetotactic bacterium
Spatially resolved GHz magnetization dynamics of a magnetite nano-particle chain inside a magnetotactic bacterium
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 transmissio...
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Personal Name(s): | Feggeler, Thomas (Corresponding author) |
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Meckenstock, Ralf / Spoddig, Detlef / Zingsem, Benjamin / Ohldag, Hendrik / Wende, Heiko / Farle, Michael / Winklhofer, Michael / Ollefs, Katharina J. | |
Contributing Institute: |
Physik Nanoskaliger Systeme; ER-C-1 |
Published in: | Physical review research, 3 (2021) 3, S. 033036 |
Imprint: |
College Park, MD
APS
2021
|
DOI: |
10.1103/PhysRevResearch.3.033036 |
Document Type: |
Journal Article |
Research Program: |
TRR 270: Hysterese-Design magnetischer Materialien für effiziente Energieumwandlung Platform for Correlative, In Situ and Operando Characterization |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevResearch.3.033036 in citations.
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. |