论文标题
通过小角度电子衍射和福柯成像观察单轴磁铁中的磁域
Observation of magnetic domains in uniaxial magnets via small-angle electron diffraction and Foucault imaging
论文作者
论文摘要
观察磁域对于理解磁性材料和设备的磁性特性很重要。在这项研究中，我们报告说，具有单轴各向异性的M型六角形的磁域可以通过小角度电子衍射和福柯成像可视化。衍射模式斑点的位置与SC取代的Hexaferrite（Bafe $ _ {12-x-δ} $ sc $ sc $ _x $ _x $ mg $_Δ$_Δ$ o $ $ $ _ {19} $）中的位置与磁域的位置相同。相反，观察到这些斑点的时间比没有替代的十六世纪的磁域时期长四倍（BAFE $ _ {12} $ o $ $ _ {19} $），展示了Bloch墙的远距离顺序。当样品倾斜时，发生了磁偏转效果以及磁性域的周期斑点。因此，我们能够通过选择偏转点以不同的磁化方向和域取向可视化磁域。结果表明，这项研究中使用的技术可用于观察单轴各向异性的磁性材料。
Observation of magnetic domains is important in understanding the magnetic properties of magnetic materials and devices. In this study, we report that the magnetic domains of M-type hexaferrites with uniaxial anisotropy can be visualized via small-angle electron diffraction and Foucault imaging. The position of the diffraction pattern spots has the same period as that of magnetic domains in a Sc-substituted hexaferrite (BaFe$_{12-x-δ}$Sc$_x$Mg$_δ$O$_{19}$). Conversely, the spots were observed four times longer than the period of magnetic domains in hexaferrite without substitution (BaFe$_{12}$O$_{19}$), demonstrating the long-range order of the Bloch walls. When the specimen was tilted, the magnetic deflection effect, as well as the periodic spots of magnetic domains, occurred. Thus, we were able to visualize the magnetic domains with different magnetization directions and domain orientations by selecting deflection spots. The results indicate that the technique utilized in this study is useful in observing the magnetic materials with uniaxial anisotropy.
