Year: 2025
Type: article
Abstract: Surface Acoustic Waves (SAW) have been used in spintronic applications to decrease the magnetic field or the electric current required to act on the magnetization. A common belief is that a SAW alone cannot achieve a directed magnetic switching in a device without an assisting magnetic field or electric current. In this work, we demonstrate magnetic domain wall motion driven solely by an acoustic wave. Using XMCD-PEEM, we show extensive evidence of SAW-induced and field-free magnetic domain wall motion (DW) in the direction of the wave propagation. Our micromagnetic simulations reveal a mechanism that allows the SAW to transfer linear momentum to the DW. Experimentally, the largest DW average velocity measured was ~12 m/s, although our simulations predict that velocities in the range of 100 m/s could be attained. This new mechanism opens the door to designing innovative spintronic devices where the magnetization can be controlled exclusively by an acoustic wave. Surface acoustic waves have previously been used, in conjunction with electric currents and assisting magnetic fields, to manipulate magnetization. Here, Rivelles, Yanes, and coauthors succeed in driving magnetic domain walls solely with surface acoustic waves, an important milestone in acoustically controlled spintronic devices.’
Source: Nature Communications
Authors: Alejandro Rivelles, Rocío Yanes, Luis Torres, Manuel Abuín, Javier Grandal, Maedeh Sepehr, Guzmán Orero-Gámez, Rodrigo Guedas, Laura Fernández-García, Raúl Izquierdo-López, Marco Maicas, Maria del Mar Sanz, Jorge Pedrós, Fernando Calle, Sandra Ruiz-Gómez, Muhammad Waqas Khaliq, Miguel Angel Niño, Saül Vélez, Michael Foerster, Luis López-Díaz, Jose Luis Prieto
Institutions: Universidad Politécnica de Madrid, Universidad de Salamanca, Universidad Autónoma de Madrid, Institut polytechnique de Grenoble, Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Grenoble, Spintronique et Technologie des Composants, Université Grenoble Alpes, Universidad Complutense de Madrid, ALBA Synchrotron (Spain)
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,990
OpenAlex ID: W4416142901