CPhSE Seminar: Dr. Alexandr Sadovnikov, Saratov State University, Saratov, Russia

sadovnikov-alexandrOn the 31th of May 2023 we will have the pleasure to welcome Alexandr Sadovnikov, Assistant Professor at the Saratov State University, Saratov, Russia to deliver a talk at the CPhSE seminar. He will discuss the possible integration of magnonic devices and interconnection between them with the use of straintronics and magnonics.

Title: Interconnection in magnonic networks: functional building blocks for an alternative controllable way of spin-wave computation

When:  On the 31th of May 2023, Wednesday, at 17:00 MSK time
Where: New Campus room E-B2-3007 BigBlueButton

About the speaker:

Alexandr Sadovnikov graduated from Saratov State University with a PhD degree in physics/optics in 2012. He has completed several international trainings in the University of Exeter (UK) and the University of Münster (Germany). Currently he is an Assistant Professor at the Department of Physics of Open Systems and the Head of Magnetic metamaterial Laboratory, Saratov State University. 

His research interests include:

· Spin waves in irregular and layered magnetic structures
· Brillouin light scattering
· Micromagnetic modelling of spin waves excitation and propagation
· Spin-wave coupling in magnetic structures: linear and nonlinear dynamics
· Periodic magnetic structures and applications to magnonic logic
· Straintronics: Multiferroic composites (YIG/BST, YIG/PZT, etc.)
· Spin-Hall, pure spin current in layered magnetic structures
· Topological stabilization of skyrmions in magnetic thin films with the interfacial Dzyaloshinskii–Moriyainteraction


In recent years much research has been directed towards the use of spin waves for signal processing at microwave and subterahertz frequencies due to the possibility to carry the information signal without the transmission of a charge current. Recent theoretical and experimental studies suggest that strain can be used to engineer energy-efficient complicated 2D and 3D piezoelectric material and heterostructures.
The main topic of the proposed talk will be devoted to the experimental observations of the strain-mediated spin-wave coupling phenomena in different magnonic structures based on the asymmetric adjacent magnonic crystals, adjacent magnetic yttrium iron garnet stripes and array of magnetic stripes, which demonstrates the collective spin-wave phenomena such as the discrete soliton formation.  The voltage-controlled spin-wave transport along bilateral magnonic stripes was demonstrated. The model describing the spin-wave transmission response and predicting its value is proposed based on the self-consistent equations. It was shown that the strain-mediated spin-wave channels can be used to route the magnonic information signal and thus the composite magnon-straintronic structure could provide to fabricating magnonic platforms for energy-efficient signal processing. The obtained results open new perspectives for the future-generation electronics using integrated magnonic networks.