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  • Title: Magnon-driven interfacial magnetoelectric coupling in Co/PMN-PT multiferroic heterostructures.
    Author: Zhou C, Zhang M, Feng C, Xu M, Wang S, Jiang C.
    Journal: Phys Chem Chem Phys; 2019 Oct 14; 21(38):21438-21444. PubMed ID: 31531470.
    Abstract:
    Magnon-driven interfacial magnetoelectric coupling in Co/PMN-PT multiferroic heterostructures is investigated at room temperature. The electric field controlled ferromagnetic resonance field possesses a loop-like curve, with a large resonance field shift between positive and negative remanent polarizations, which confirms a non-volatile strong magnetoelectric coupling. However, with a non-magnetic Ta layer inserted at the Co/PMN-PT interface, a piezostrain-induced butterfly-like curve of the resonance field versus applied electric field of the Co/Ta/PMN-PT multiferroic heterostructure is observed. Further, the non-volatile behavior of the resonance field changing with the applied electric field can be obtained, consistent with the result of polarization versus applied electric field curve, which can be attributed to the magnon-driven interfacial magnetoelectric coupling, showing a strong correlation of magnetization of Co thin film and the polarization of PMN-PT. The result is promising for the design of future multiferroic devices.
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