标题： 磁力显微镜和模拟应变介导的Ni/PMN-PT纳米结构中的磁化控制 显示英文标题

标题： Magnetic microscopy and simulation of strain-mediated control of magnetization in Ni/PMN-PT nanostructures

摘要： 应变介导的薄膜多铁材料，包括压电/铁磁异质结构，使得通过电场对磁化进行操控比其他方法更加高效；然而，对这些材料制成的纳米结构的研究是有限的。 在这里，我们使用带有极化分析的扫描电子显微镜（SEMPA）和微磁模拟来表征在铁电PMN-PT基底上生长的铁磁Ni纳米结构。 Ni纳米结构的磁化可以通过样品几何形状和施加的电场进行控制，这会应变铁电基底并通过磁弹性耦合改变磁化。 我们评估了两种在应变铁电基底上的铁磁纳米结构的模拟：包含简单单轴应变的传统微磁模拟，以及耦合的微磁-弹动力学模拟。 这两种模拟都能定性地捕捉到由施加应变产生的磁化变化响应，其中耦合解提供了更准确的表示。 显示英文摘要

摘要： Strain-mediated thin film multiferroics comprising piezoelectric/ferromagnetic heterostructures enable the electrical manipulation of magnetization with much greater efficiency than other methods; however, the investigation of nanostructures fabricated from these materials is limited. Here we characterize ferromagnetic Ni nanostructures grown on a ferroelectric PMN-PT substrate using scanning electron microscopy with polarization analysis (SEMPA) and micromagnetic simulations. The magnetization of the Ni nanostructures can be controlled with a combination of sample geometry and applied electric field, which strains the ferroelectric substrate and changes the magnetization via magnetoelastic coupling. We evaluate two types of simulations of ferromagnetic nanostructures on strained ferroelectric substrates: conventional micromagnetic simulations including a simple uniaxial strain, and coupled micromagnetic-elastodynamic simulations. Both simulations qualitatively capture the response of the magnetization changes produced by the applied strain, with the coupled solution providing more accurate representation.