General Lab Information

Thomas Feggeler

Research Staff Scientist, Imaging & Microscopy Program, National Synchrotron Light Source II

Thomas Feggeler

Brookhaven National Laboratory

National Synchrotron Light Source II
Bldg. 741, Room 1L150
P.O. Box 5000
Upton, NY 11973-5000

(631) 344-8175
(341) 799-6413
tfeggeler1@bnl.gov

Thomas Feggeler is a Research Staff Scientist in the Imaging and Microscopy Program at the National Synchrotron Light Source II. He is working on the development of the Soft-Xray Nanoprobe - a state-of-the-art soft-X-ray  nano-imaging and spectroscopy tool with high coheren photon flux in the energy range from 250 eV to 2500 eV and full polarization control, aiming at sub 10 nm spatial resolution. His personal research focuses on magnetism and its dynamics in nanoscaled ensembles using X-ray spectromicroscopy, magnetic resonance spectroscopy and micromagnetic simulations. 

Education | Appointments | Publications | Awards


Education

Ph.D. (Dr. rer. nat.), University of Duisburg Essen, November 20th 2020, Ph.D. Thesis: “Element-specific detection of magnetization dynamics using Scanning Transmission X-ray Microscopy“. 

M.Sc., Physics, University of Duisburg-Essen, May 20th 2016, M.Sc.-Thesis: “Mikromagnetische Simulationen zur statischen und dynamischen Charakterisierung von Nanopartikeln“ (Micromagnetic simulations for the static and dynamic characterization of nano particles).

B.Sc., Physics, University Duisburg-Essen, September 26th 2011, B.Sc.-Thesis: "Bau eines Spektrometers zur Messung der Ferromagnetischen Resonanz mittels magnetooptischem Kerr-Effekt“ (Construction of a spectrometer for the measurement of ferromagnetic resonance by means of the magneto-optical Kerr effect).

Professional Appointments

Research Staff Scientist - August 2024 – Today - in the Imaging & Microscopy Program at the National Synchrotron Light Source II at Brookhaven National Laboratory. 

Postdoctoral Researcher - March 2023 – August 2024 - in the research group of Roger W. Falcone at the University of California, Berkeley | Department of Physics | STROBE NSF Science and Technology Center on Real-Time Functional Imaging.

Postdoctoral Researcher - February 2021 – February 2023 - in the Microscopy Group at the Advanced Light Source at Lawrence Berkeley National Laboratory.

Postdoctoral Researcher - December 2020 – January 2021 - in the research group of Heiko Wende at the University of Duisburg-Essen.

Selected Publications

  • Efremova MV, Wiedwald U, Sigmund F, et al (2025) Genetically Controlled Iron Oxide Biomineralization in Encapsulin Nanocompartments for Magnetic Manipulation of a Mammalian Cell Line. Advanced Functional Materials. https://doi.org/10.1002/adfm.202418013
  • Feggeler T, Meckenstock R, Strusch T, et al (2024) An Ultrasensitive Molecular Detector for Direct Sensing of Spin Currents at Room Temperature. ACS Applied Materials & Interfaces 16:54139–54145. https://doi.org/10.1021/acsami.4c09015
  • Zingsem BW, Feggeler T, Spoddig D, et al (2024) Reciprocity relations in a biologically inspired nanomagnonic system with dipolar coupling. Applied Physics Letters 124:. https://doi.org/10.1063/5.0195215
  • Feggeler T, Levitan A, Marcus MA, et al (2023) Scanning transmission X-ray microscopy at the Advanced Light Source. Journal of Electron Spectroscopy and Related Phenomena 267:147381. https://doi.org/10.1016/j.elspec.2023.147381
  • Feggeler T, Lill J, Günzing D, et al (2023) Spatially-resolved dynamic sampling of different phasic magnetic resonances of nanoparticle ensembles in a magnetotactic bacterium Magnetospirillum magnetotacticum. New Journal of Physics 25:043010. https://doi.org/10.1088/1367-2630/acc81f
  • Zingsem B, Feggeler T, Meckenstock R, et al (2023) Evaluation protocol for revealing magnonic contrast in TR-STXM measurements. AIP Advances 13:. https://doi.org/10.1063/5.0145753
  • Feggeler T, Meckenstock R, Spoddig D, et al (2022) Element-specific visualization of dynamic magnetic coupling in a Co/Py bilayer microstructure. Scientific Reports 12:. https://doi.org/10.1038/s41598-022-23273-y
  • Feggeler T, Meckenstock R, Spoddig D, et al (2021) Spatially resolved GHz magnetization dynamics of a magnetite nano-particle chain inside a magnetotactic bacterium. Physical Review Research 3:. https://doi.org/10.1103/physrevresearch.3.033036
  • Josten N, Feggeler T, Meckenstock R, et al (2020) Dynamic unidirectional anisotropy in cubic FeGe with antisymmetric spin-spin-coupling. Scientific Reports 10:. https://doi.org/10.1038/s41598-020-59208-8
  • Pile S, Feggeler T, Schaffers T, et al (2020) Non-standing spin-waves in confined micrometer-sized ferromagnetic structures under uniform excitation. Applied Physics Letters 116:. https://doi.org/10.1063/1.5139881
  • Zingsem BW, Feggeler T, Terwey A, et al (2019) Biologically encoded magnonics. Nature Communications 10:. https://doi.org/10.1038/s41467-019-12219-0
  • Schaffers T, Feggeler T, Pile S, et al (2019) Extracting the Dynamic Magnetic Contrast in Time-Resolved X-Ray Transmission Microscopy. Nanomaterials 9:940. https://doi.org/10.3390/nano9070940
  • Scheibel F, Zingsem B, Feggeler T, et al (2019) Magnetic anisotropy of single-crystal antiperovskite Mn3GaC studied by ferromagnetic resonance and dynamic magnetic-response simulations. Physical Review Materials 3:. https://doi.org/10.1103/physrevmaterials.3.054403
  • Schaffers T, Meckenstock R, Spoddig D, et al (2017) The combination of micro-resonators with spatially resolved ferromagnetic resonance. Review of Scientific Instruments 88:. https://doi.org/10.1063/1.4996780

Awards & Recognition

Center for Nanointegration Duisburg-Essen (CENIDE) Best Paper Award 2024 in Magnetism for New Journal of Physics 25, 043010 (2023) "Spatially-resolved dynamic sampling of different phasic magnetic resonances of nanoparticle ensembles in a magnetotactic bacterium Magnetospirillum magnetotacticum"

AVS Magnetic Interfaces and Nanostructures Division Postdoctoral Award 2023.

Center for Nanointegration Duisburg-Essen (CENIDE) Best Paper Award 2021 in Magnetism for PHYSICAL REVIEW RESEARCH 3, 033036 (2021) „Spatially resolved GHz magnetization dynamics of a magnetite nanoparticle chain inside a magnetotactic bacterium“.

Thomas Feggeler

Brookhaven National Laboratory

National Synchrotron Light Source II
Bldg. 741, Room 1L150
P.O. Box 5000
Upton, NY 11973-5000

(631) 344-8175
(341) 799-6413
tfeggeler1@bnl.gov

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