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Non-symmetric spin-pumping in a multiferroic heterostructure

Abstract : We present spin pumping experiments in Co/Pt bilayers grown on Al2O3(0001) and on ferroelectric Y-cut LiNbO3 substrates. Spin pumping is triggered by resonant ferromagnetic resonance induced by surface acoustic waves. We observe that spin pumping efficiency varies when both the magnetization vector and the acoustic wave vector are reversed in Pt/Co/LiNbO3. This phenomenon is not observed in Pt/Co/Al2O3. We propose that the in-plane electric polarization of LiNbO3 is at the origin of the observed phenomenon. These observations open up the perspective of an electric fi eld control of spin pumping efficiency.
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Submitted on : Monday, May 4, 2020 - 2:36:18 PM
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Pauline Rovillain, Ronei Cardoso de Oliveira, Massimiliano Marangolo, Jean-Yves Duquesne. Non-symmetric spin-pumping in a multiferroic heterostructure. Physical Review B, American Physical Society, 2020, 102 (18), pp.184409. ⟨10.1103/PhysRevB.102.184409⟩. ⟨hal-02562162v1⟩

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