Principal Investigator: Priv.-Doz. Dr. habil. Oleksandr Dobrovolskiy

Scientific Staff: PhD student Sebastian Lamb-Camarena, PhD student Noura Zembaa, Master student Aram Sajdak, Dr. Khrystyna Levchenko, Dr. Sebastian Knauer, Prof. Dr. Andrii Chumak

Traditionally, the primary field where curvature has been at the heart of research was the theory of general relativity. In recent years, however, the impact of curvilinear geometry enters various disciplines ranging from solid-state physics to biology, giving rise to a plethora of emerging domains in curvilinear geometries such as plasmonics, cell biology, 2D van der Waals materials, magnetism, and superconductivity. At present, the exploration of complex-shaped nano-architectures is a rapidly developing research field with exciting novel physical phenomena stemming from the increased complexity in spin textures, frustration and magnetization dynamics, emerging because of geometry-, curvature-, and topology-induced effects.

Publications

• Complex-shaped 3D nano-architectures for magnetism and superconductivity
  O. V. Dobrovolskiy, O. V. Pylypovskyi, L. Skoric, A. Fernández-Pacheco, A. Van Den Berg, S. Ladak, M. Huth, 
  in "Curvilinear Micromagnetism: from fundamentals to applications" edited by D. Makarov and D. Sheka 
• Engineered magnetization and exchange stiffness in direct-write Co-Fe nanoelements
  S. A. Bunyaev, B. Budinska, R. Sachser, Q. Wang, K. Levchenko, S. Knauer, A. V. Bondarenko, M. Urbanek, K. Y. Guslienko, A. V. Chumak, M. Huth, G. N. Kakazei, O. V. Dobrovolskiy
  Appl. Phys. Lett. 118, 022408 (2021)
• New twist in magnetism and superconductivity: Prospects of curvilinear geometry
  D. Makarov, O.M. Volkov, A. Kakay, O.V. Pylypovskyi, B. Budinska, O.V. Dobrovolskiy
• Writing 3D nanomagnets using focused electron beams, 
  A. Fernandez-Pacheco, L. Skoric, J. M. De Teresa, J. P. Navarro, M. Huth, O. V. Dobrovolskiy
  Materials 13, 3774 (2020)
• Spin-wave spectroscopy of individual ferromagnetic nanodisks
  O. V. Dobrovolskiy, S. A. Bunyaev, N. R. Vovk, D. Navas, P. Gruszecki, M. Krawczyk, R. Sachser, M. Huth, A. V. Chumak, K. Y. Guslienko, and G. N. Kakazei
  Nanoscale 12, 21207 (2020)
• Crystalline niobium carbide superconducting nanowires prepared by focused ion beam direct writing
  F. Porrati, S. Barth, R. Sachser, O. V. Dobrovolskiy, A. Seybert, A. S. Frangakis, and M. Huth
  ACS Nano 13, 6287 (2019)
• Microwave radiation detection with an ultra-thin and free standing superconducting niobium nano-helix
  S. Lösch, A. Alfonsov, O. V. Dobrovolskiy, R. Keil, V. Engemaier, S. Baunack, G. Li, O. G. Schmidt, and D. Bürger,
  ACS Nano 13, 2948 (2019)
• Microwave emission from superconducting vortices in Mo/Si superlattices
  O. V. Dobrovolskiy, V. M. Bevz, M. Yu. Mikhailov, O. I. Yuzephovich, V. A. Shklovskij, R. V. Vovk, M. I. Tsindlekht, R. Sachser, and M. Huth,
  Nature Commun. 9, 4927 (2018)