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Thomas Feggeler

Microscopy
Postdoctoral Staff, Photon Science

Contact

tfeggeler@lbl.govMailstop: 2R0300510-486-5364 (Office)
Location(s): 002-0239

Websites

Responsibilities

Implementation of a combination of Scanning Transmission X-ray Microscopy (STXM) and Ferromagnetic Resonance (FMR) as Time-resolved STXM (TR-STXM) technique at the Advanced Light Source Beamline 11.0.2.2, supplemented by Vector Network Analyzer (VNA) and micro-resonator based FMR spectroscopy and micromagnetic simulations.

 

 

Biographical Information

Ph.D. (Dr. rer. nat.) Physics, University of Duisburg-Essen, Germany. Advised by H. Wende and M. Farle. Dissertation: Element-specific detection of magnetization dynamics using Scanning Transmission X-ray Microscopy

M. Sc. Physics, University of Duisburg-Essen, Germany

B. Sc. Physics, University of Duisburg-Essen, Germany

Previous – academic:

Postdoctoral Researcher, Workgroup Prof. Dr. H. Wende, University of Duisburg-Essen, Germany

Research Assistant, Workgroup Prof. Dr. H. Wende, University of Duisburg-Essen, Germany

Research Assistant, Workgroup Prof. Dr. M. Farle, University of Duisburg-Essen, Germany

Previous – industry:

Product development and quality management hard- and software video surveillance systems and access controls for the financial sector, MAKU Group, Germany

Research Interests

Spin based logic with biologically grown and artificially created nano structures/particles, biocompatible nanoparticles and their comprehensive characterisation by time resolved Scanning Transmission X-ray Microscopy, ferromagnetic resonance spectroscopy and micromagnetic simulations.

 

Selected Publications

T. Feggeler, R. Meckenstock, D. Spoddig, C. Schöppner, B. Zingsem, T. Schaffers, Hendik Ohldag, Heiko Wende, M. Farle, Andreas Ney and K.J. Ollefs, Element‐specific visualization of dynamic magnetic coupling in a Co/Py bilayer microstructure. Scientific Reports, 2022. 12(18724): p. 1. DOI:10.1038/s41598-022-23273-y
T. Feggeler, R. Meckenstock, D. Spoddig, B.W. Zingsem, H. Ohldag, H. Wende, M. Farle, M. Winklhofer, and K.J. Ollefs, Spatially resolved GHz magnetization dynamics of a magnetite nano-particle chain inside a magnetotactic bacterium. Physical Review Research, 2021. 3(3): 033036. DOI:10.1103/PhysRevResearch.3.033036
B. Zingsem (30 %), M. Farle (10 %), T. Feggeler (30 %), and I. Iglesias (30 %), Tubular nanosized magnetic wires with 360° magnetic domain walls, United States Patent No. US 10,614,902 B1, Assignee: Universität Duisburg-Essen (Essen, DE), United States 2020. PDF from googleapis.com
S. Pile, T. Feggeler, T. Schaffers, R. Meckenstock, M. Buchner, D. Spoddig, B. Zingsem, V. Ney, M. Farle, H. Wende, H. Ohldag, A. Ney, and K. Ollefs, Non-standing spin-waves in confined micrometer-sized ferromagnetic structures under uniform excitation. Applied Physics Letters, 2020. 116(7): p. 072401-1-072401-5. DOI:10.1063/1.5139881
N. Josten, T. Feggeler, R. Meckenstock, D. Spoddig, M. Spasova, K. Chai, I. Radulov, Z.A. Li, O. Gutfleisch, M. Farle, and B. Zingsem, Dynamic unidirectional anisotropy in cubic FeGe with antisymmetric spin-spin-coupling. Scientific Reports, 2020. 10(2861): p. 1. DOI:10.1038/s41598-020-59208-8
B. Zingsem, T. Feggeler, A. Terwey, S. Ghaisari, D. Spoddig, D. Faivre, R. Meckenstock, M. Farle, and M. Winklhofer, Biologically encoded magnonics. Nature Communications, 2019. 10: p. 4345. DOI:10.1038/s41467-019-12219-0
T. Schaffers, T. Feggeler, S. Pile, R. Meckenstock, M. Buchner, D. Spoddig, V. Ney, M. Farle, H. Wende, S. Wintz, M. Weigand, H. Ohldag, K. Ollefs, and A. Ney, Extracting the Dynamic Magnetic Contrast in Time-Resolved X-ray Transmission Microscopy. Nanomaterials (Basel), 2019. 9(7): p. 1-13. DOI:10.3390/nano9070940
F. Scheibel, B. Zingsem, T. Feggeler, R. Meckenstock, D. Spoddig, M. Farle, and M. Acet, Magnetic anisotropy of single-crystal antiperovskite Mn3GaC studied by ferromagnetic resonance and dynamic magnetic-response simulations. Physical Review Materials, 2019. 3(5): p. 054403-1-054403-5. DOI:10.1103/PhysRevMaterials.3.054403

 

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