Related Experiment Video
Updated: Jun 10, 2025

Scanning SQUID Study of Vortex Manipulation by Local Contact
Published on: February 1, 2017
Excitation of the Gyrotropic Mode in a Magnetic Vortex by Time-Varying Strain
Vadym Iurchuk1, Jürgen Lindner1, Jürgen Fassbender1,2
1Institute of Ion Beam Physics and Materials Research, <a href="https://ror.org/01zy2cs03">Helmholtz-Zentrum Dresden-Rossendorf</a>, 01328 Dresden, Germany.
Abstract:
We demonstrate the excitation of the gyrotropic mode in a magnetostrictive vortex by time-varying strain. The vortex dynamics is driven by a time-varying voltage applied to the piezoelectric substrate and detected electrically by spin rectification at subthreshold values of rf current. When the frequency of the time-varying strain matches the gyrotropic frequency at a given in-plane magnetic field, the strain-induced in-plane magnetic anisotropy leads to a resonant excitation of the gyration dynamics in the magnetic vortex. We show that nonlinear gyrotropic dynamics can be excited already for moderate amplitudes of the time-varying strain.
Related Concept Videos
Magnetic Field due to Moving Charges
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Magnetic Field Due To A Thin Straight Wire
Atomic Nuclei: Nuclear Relaxation Processes
Torque On A Current Loop In A Magnetic Field
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Force On A Current Loop In A Magnetic Field
Magnetic Field Of A Current Loop

