SP 15 Spin waves and magnonics SP15 - Parallel Session 1 SP15 - Parallel Session 1 SP15.1.02 Imaging of large amplitude strain spin waves B. Casals, N. Statuto, A. Hernández-Mínguez, M. Foerster, L. Aballe, J. M. Hernàndez, F. Macià Text In this talk we will show stroboscopic images of large amplitude “strain spin waves” over areas of a few millimeters in nickel thin films. Surface Acoustic Waves (SAW) are propagating strain waves that can be generated through oscillating electric fields at the surface of a piezoelectric material and can couple to a magnetic system in specially designed hetrostructures comprising both a piezoelectric and a magnetic material. We have shown recently that magnetic states in nanostructures can be dynamically changed at the SAW frequencies (GHz) [1]. In this talk we report an experimental study on photo-emission electron microscopy (PEEM) where we image the magnetization dynamics in a ferromagnetic thin film of Ni deposited directly onto a piezoelectric material (LiNbO3) capable to produce directional SAW. We have synchronized the SAW with the synchrotron repetition rate and acquired instant images of the magnetization state simultaneously with the strain wave. By exciting different SAW frequencies (100 MHz-1 GHz) we have observed strain spin waves with different wavelengths propagating on a large area of a few millimeters. The results we present in this talk provide fundamental insight into magnetoelastic coupling in nanostructures having implications in the design of strain-controlled magnetostrictive and magnonic devices. 1 / 26