2018/11/23 by Sucheta Mondal, Md Ahsanul Abeed, Koustuv Dutta +4 · 1 citation
Materials Science · Physics and Astronomy · #Acoustics #Composite material #Condensed matter physics #Magnetic Properties and Applications #Magnetic field #Magnetic properties of thin films #Magnetization #Magnetostriction #Materials science #Modulation (music) #Multiferroics and related materials #Nanomagnet #Physics #Piezoelectricity #Substrate (aquarium) #cond-mat.mes-hall
paper · pdf · doi:10.1021/acsami.8b19243
published as ACS Applied Materials and Interfaces, 10, 43970 (2018) · To appear in ACS Applied Materials and Interfaces
openalex publication_date 2018/11/23 · arxiv created 2018/11/27 · arxiv updated 2019/02/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Magnetoelastic (or “straintronic”) switching has emerged as an extremely energy-efficient mechanism for switching the magnetization of magnetostrictive nanomagnets in magnetic memory and logic, and non-Boolean circuits. Here, we investigate the ultrafast magnetodynamics associated with straintronic switching in a single quasielliptical magnetostrictive Co nanomagnet deposited on a piezoelectric Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 substrate using time-resolved magneto-optical Kerr effect (TR-MOKE) measurements. The pulsed laser pump beam in the TR-MOKE plays a dual role: it causes precession of the nanomagnet’s magnetization about an applied bias magnetic field and it also generates surface acoustic waves in the piezoelectric substrate that produce periodic strains in the magnetostrictive nanomagnet and modulate the precessional dynamics. This modulation gives rise to intriguing hybrid magnetodynamical modes in the nanomagnet, with a rich spin-wave texture. The characteristic frequencies of these modes are 5–15 GHz, indicating that strain can affect magnetization in a magnetostrictive nanomagnet in time scales much smaller than 1 ns (∼100 ps). This can enable ∼10 GHz range magnetoelastic nano-oscillators that are actuated by strain instead of a spin-polarized current, as well as ultrafast magnetoelectric generation of spin waves for magnonic logic circuits, holograms, etc.