论文标题
域墙模式和巨大的反应功能
Domain wall patterning and giant response functions in ferrimagnetic spinels
论文作者
论文摘要
中尺度域壁现象的操纵已成为在功能设备中设计铁电响应的有力策略，但在磁性领域尚未实现其全部潜力。我们表明，机械紧张的MN $ _3 $ o $ $ _4 $和mnv $ _2 $ o $ _4 $的样品表现出在已知的磁结构过渡下方的块状磁化，类似于块状磁化，类似于非洲电性材料中报道的结构域。在我们以前的磁力显微镜数据上构建，我们使用小角度中子散射表明这些模式扩展到了整体，并证明了通过施加的磁场和机械应力来操纵域壁的能力。然后，我们将这些结构域返回到这些材料中报道的异常大的磁弹性和磁性反应函数，直接将同一晶体上的局部和宏观测量相关联。
The manipulation of mesoscale domain wall phenomena has emerged as a powerful strategy for designing ferroelectric responses in functional devices, but its full potential has not yet been realized in the field of magnetism. We show that mechanically strained samples of Mn$_3$O$_4$ and MnV$_2$O$_4$ exhibit a stripe-like patterning of the bulk magnetization below known magnetostructural transitions, similar to the structural domains reported in ferroelectric materials. Building off our previous magnetic force microscopy data, we use small angle neutron scattering to show that these patterns extend to the bulk, and demonstrate an ability to manipulate the domain walls via applied magnetic field and mechanical stress. We then connect these domains back to the anomalously large magnetoelastic and magnetodielectric response functions reported in these materials, directly correlating local and macroscopic measurements on the same crystals.
