Tobias Wagner

Antiferromagnets (AFMs) possess characteristics that make them ideal for spintronic applications: intrinsically, AFM dynamics are much faster compared to FM, AFMs are insensitive to external fields due to their zero net magnetization and produce no stray fields. However, FMs can be manipulated more efficiently. Thus combining AFMs and FMs into hybrid devices to exploit the manipulability of FMs together with the speed of AFMs is a desirable goal. Today, such hybrid devices are widely used, with AFMs having a passive role.

My research is directed to investigate whether AFMs can also be used as active parts in hybrid devices. I am interested in both the static domain wall configurations and domain wall dynamics originating from the combination of an AFM with a FM layer. While using analytical methods to understand the physics and link phenomenology to microscopic theories, I utilize atomistic simulations from ab initio constants and micromagnetic simulations to model larger and more realistic systems that can be compared to experimental data. In a collaboration with the group of Prof. Dr. Nowak at the University of Konstanz I co-develop atomistic spin dynamics simulations. I enjoy working in an interdisciplinary environment in close collaboration with colleagues from both theoretical and experimental physics. On a broader scale I am also interested in scientific applications of machine learning and artificial intelligence.

Research Interests:

  • Condensed Matter Physics
  • Interdisciplinary research in experimental and theoretical study of magnetism Antiferromagnetic Spintronics
  • Antiferromagnetic-ferromagnetic Hybrid Systems
  • Atomistic and Micromagnetic Simulations
  • Machine Learning

Publications and Preprints:

Imprinting of Antiferromagnetic Vortex States in NiO-Fe Nanostructures
M. Ślęzak, T. Wagner, V. K. Bharadwaj, O. Gomonay, A. Kozioł-Rachwał, T. O. Menteş, A. Locatelli, M. Zając, D. Wilgocka-Ślęzak, P. Dróżdż, T. Ślęzak,
arXiv:2403.05151 (2024)

Revealing the ultra-fast domain wall motion in Manganese Gold through permalloy capping,
Sarah Jenkins, Tobias Wagner, Olena Gomonay, Karin Everschor-Sitte,
arXiv:2311.04305 (2023)

Coupling of ferromagnetic and antiferromagnetic spin dynamics in Mn2Au/NiFe thin-film bilayers, Hassan Al-Hamdo, Tobias Wagner, Yaryna Lytvynenko, Gutenberg Kendzo, Sonka Reimers, Moritz Ruhwedel, Misbah Yaqoob, Vitaliy I. Vasyuchka, Philipp Pirro, Jairo Sinova, Mathias Kläui, Martin Jourdan, Olena Gomonay, Mathias Weiler,
Phys. Rev. Lett. 131, 046701 – Published 24 July 2023