论文标题
抗铁磁结构中应变诱导的形状各向异性
Strain-induced Shape Anisotropy in Antiferromagnetic Structures
论文作者
论文摘要
我们证明了如何使用形状诱导的应变来控制Nio/PT薄膜中的抗铁磁阶。对于沿膜的易于且硬磁晶的各向异性轴形成的矩形元件，我们观察到不同的结构域结构，并确定了不同域构型不同的磁弹性相互作用。我们通过对域构型引起的自发应变以及由于底物和图案的形状引起的弹性应变以及弹性应变来重现实验观察结果。这使我们能够证明并解释如何使用矩形元件的纵横比的变化来控制抗铁磁基态态域的构型。与形状依赖性应变不仅需要在抗磁磁设备的设计中考虑，而且有可能用于定制其性质，从而提供了额外的手柄来控制抗铁磁铁。
We demonstrate how shape-induced strain can be used to control antiferromagnetic order in NiO/Pt thin films. For rectangular elements patterned along the easy and hard magnetocrystalline anisotropy axes of our film, we observe different domain structures and we identify magnetoelastic interactions that are distinct for different domain configurations. We reproduce the experimental observations by modeling the magnetoelastic interactions, considering spontaneous strain induced by the domain configuration, as well as elastic strain due to the substrate and the shape of the patterns. This allows us to demonstrate and explain how the variation of the aspect ratio of rectangular elements can be used to control the antiferromagnetic ground state domain configuration. Shape-dependent strain does not only need to be considered in the design of antiferromagnetic devices, but can potentially be used to tailor their properties, providing an additional handle to control antiferromagnets.
