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Laboratory experiment demonstrates electrical detection of spin wave resonance driven by acoustic spin currents in magnetic heterostructures, suggesting pathways for acoustic spintronic devices.
We demonstrate the electrical detection of spin wave resonance excited by a spin current that is predominantly generated via spin-rotation coupling (SRC) driven by a surface acoustic wave (SAW). By analyzing the magnetic field angle dependence of the total acoustic voltage signal, the contributions from the SRC effect, anisotropic magnetoresistance rectification effect, and planar Hall effect are extracted separately. When the SAW vector is parallel to the magnetization, the magneto-static backward volume wave resonance mode is excited by a spin current generated via SAW-driven SRC. Our results provide a feasible scheme for investigating SAW-driven spin current generation in a near-zero-magnetostriction-coefficient magnetic film/light metal system, which is helpful in further studies of electrically controlled spintronic devices.
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Zhao et al. (2026) studied this question.
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