Dresden 2020 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 25: Bio- and Molecular Magnetism (joint session MA/CPP)

CPP 25.7: Vortrag

Montag, 16. März 2020, 16:30–16:45, HSZ 101

Dynamic magnetic response of a single Magnetite nanoparticle chain detected by Scanning Transmission X-Ray Microscopy Ferromagnetic Resonance — •Thomas Feggeler1, Benjamin Zingsem1,2, Ralf Meckenstock1, Michael Winklhofer3, Detlef Spoddig1, Hendrik Ohldag4, Michael Farle1, Heiko Wende1, and Katharina Ollefs11Faculty of Physics and CENIDE, University Duisburg-Essen, Lotharstr. 1, Duisburg, Germany — 2ERC and PGI, Fz. Jülich GmbH, Jülich, Germany — 3School of Mathematics and Science, University of Oldenburg, Oldenburg, Germany — 4Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, United States

The dynamic magnetization of a single nanoparticle chain of 19 Magnetite particles (diameter of about 50 nm) embedded in a bacterium Magnetospirillum Magnetotacticum is measured using Scanning Transmission X-Ray Microscopy detected Ferromagnetic Resonance (STXM-FMR) [1]. A resonant response of the segments of the nanoparticle chain is identified and confirmed by micromagnetic simulations. STXM-FMR features the element specific detection of magnetization dynamics with a spatial resolution < 50 nm and a time resolution in the ps regime. The manipulation of the genetic code of the bacteria allows to control the arrangement of the nanoparticles leading to the creation of magnonic logic devices as a future concept for magnonic computing [2]. [1] S. Bonetti, et al., Rev. Sci. Instrum. 86 (2015). [2] B. W. Zingsem, et al., Nat. Commun. 10 (2019). Financial support: FWF Project I-3050, ORD-49, DFG Project 321560838.

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