Hubei Province Engineering Research Center for Intelligent Micro-nano Medical Equipment and Key Technologies, School of Electronics and Electrical Engineering, No. 1 Sunshine Avenue, Jiangxia District, Wuhan, 430200, People's Republic of China.
Key Laboratory for Magnetism and Magnetic Materials, Ministry of Education, Lanzhou University, Lanzhou 730000, People's Republic of China.
Phys Chem Chem Phys. 2019 Oct 14;21(38):21438-21444. doi: 10.1039/c9cp04169a. Epub 2019 Sep 18.
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.
室温下研究了 Co/PMN-PT 多铁异质结构中的磁振子驱动的界面磁电耦合。电场控制的铁磁共振场具有类环状曲线，在正、负剩余极化之间具有较大的共振场移动，这证实了非易失性的强磁电耦合。然而，在 Co/PMN-PT 界面插入非磁性 Ta 层后，观察到 Co/Ta/PMN-PT 多铁异质结构的共振场与外加电场的关系呈现出蝴蝶状曲线。此外，可以获得与外加电场相关的共振场变化的非易失性行为，与极化与外加电场曲线的结果一致，这归因于磁振子驱动的界面磁电耦合，表现出 Co 薄膜的磁化与 PMN-PT 的极化之间的强烈相关性。这一结果为未来多铁性器件的设计提供了有希望的方向。
