Iurchuk Vadym, Lindner Jürgen, Fassbender Jürgen, Kákay Attila
Institute of Ion Beam Physics and Materials Research, <a href="https://ror.org/01zy2cs03">Helmholtz-Zentrum Dresden-Rossendorf</a>, 01328 Dresden, Germany.
Institute of Solid State and Materials Physics, <a href="https://ror.org/042aqky30">Technische Universität Dresden</a>, 01062 Dresden, Germany.
Phys Rev Lett. 2024 Oct 4;133(14):146701. doi: 10.1103/PhysRevLett.133.146701.
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.
我们通过时变应变展示了磁致伸缩涡旋中陀螺模式的激发。涡旋动力学由施加到压电衬底上的时变电压驱动，并在射频电流的亚阈值值下通过自旋整流进行电检测。当时变应变的频率与给定平面内磁场下的陀螺频率匹配时，应变诱导的平面内磁各向异性会导致磁涡旋中回转动力学的共振激发。我们表明，对于适度幅度的时变应变，非线性陀螺动力学就可以被激发。
