We present a simple experimental approach to generating and detecting surface-propagating magneto-elastic waves. Using the ultrafast optical transient grating geometry, we drive in-plane propagating surface acoustic waves which couple to, and resonantly drive, magnetization precession in thin magnetic films. The optical approach provides for the real-time detection of both elastic wave transients as well as the tightly coupled magnetization precession in independent detection channels and thus reveals the tight coupling between the two when an appropriate magnetic field is applied. We discuss the experimental geometry and resulting linear magneto-elastic responses. We briefly touch upon nonlinear magnetoelastic properties, which is the focus of our current work.
Chia-Lin Chang, Julius Janušonis, Vladimir M. Vlasov, Alexey M. Lomonosov, Vasily V. Temnov, and Ra'anan I. Tobey, "Transient grating generation of ultrafast surface magneto-elastic waves," Proc. SPIE 9931, Spintronics IX, 99312V (Presented at SPIE Nanoscience + Engineering: August 31, 2016; Published: 26 September 2016); https://doi.org/10.1117/12.2239110.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 14,000 conference presentations, including many plenary and keynote presentations.