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001     904872
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024 7 _ |a 10.1103/PhysRevResearch.3.033036
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100 1 _ |a Feggeler, Thomas
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245 _ _ |a Spatially resolved GHz magnetization dynamics of a magnetite nano-particle chain inside a magnetotactic bacterium
260 _ _ |a College Park, MD
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520 _ _ |a 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.
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536 _ _ |a DFG project 405553726 - TRR 270: Hysterese-Design magnetischer Materialien für effiziente Energieumwandlung (405553726)
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700 1 _ |a Meckenstock, Ralf
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700 1 _ |a Spoddig, Detlef
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700 1 _ |a Zingsem, Benjamin
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700 1 _ |a Ohldag, Hendrik
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700 1 _ |a Wende, Heiko
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700 1 _ |a Farle, Michael
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700 1 _ |a Winklhofer, Michael
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700 1 _ |a Ollefs, Katharina J.
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773 _ _ |a 10.1103/PhysRevResearch.3.033036
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|t Physical review research
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|y 2021
|x 2643-1564
856 4 _ |u https://juser.fz-juelich.de/record/904872/files/PhysRevResearch.3.033036.pdf
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856 4 _ |u https://juser.fz-juelich.de/record/904872/files/Spatially%20resolved%20GHz.pdf
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