Bibliographic Details
| Title: |
Spatially resolved GHz magnetization dynamics of a magnetite nano-particle chain inside a magnetotactic bacterium |
| Authors: |
Thomas Feggeler, Ralf Meckenstock, Detlef Spoddig, Benjamin W. Zingsem, Hendrik Ohldag, Heiko Wende, Michael Farle, Michael Winklhofer, Katharina J. Ollefs |
| Source: |
Physical Review Research, Vol 3, Iss 3, p 033036 (2021) |
| Publisher Information: |
American Physical Society, 2021. |
| Publication Year: |
2021 |
| Collection: |
LCC:Physics |
| Subject Terms: |
Physics, QC1-999 |
| More Details: |
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 Fe_{3}O_{4} 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. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2643-1564 |
| Relation: |
https://doaj.org/toc/2643-1564 |
| DOI: |
10.1103/PhysRevResearch.3.033036 |
| Access URL: |
https://doaj.org/article/b1754d7e5d7c403c82cc22cd8f44b9ca |
| Accession Number: |
edsdoj.b1754d7e5d7c403c82cc22cd8f44b9ca |
| Database: |
Directory of Open Access Journals |
