M型六角铁氧体中磁泡的空锥傅科成像和小角电子衍射观察
Magnetic bubbles in an M-type hexagonal ferrite observed by hollow-cone Foucault imaging and small-angle electron diffraction
摘要：
我们报道了M型六角铁氧体BaFe $_{10.35}$ Sc $_{1.6}$ Mg $_{0.05}$ O $_{19}$的磁条纹畴和磁泡等纳米级磁性织构的空锥成像和小角电子衍射。空心锥傅科方法的优点是，具有各种磁化方向的磁畴可以在聚焦条件下可视化。此外，磁泡中的磁畴壁的对比度取决于照射光束的倾斜角度。小角电子衍射和空心锥傅科成像的结合证明，在磁畴壁的磁化表现出在磁条畴和磁泡的面内方向。
英文摘要：
We report hollow-cone imaging and small-angle electron diffraction of nanoscale magnetic textures such as magnetic-striped domains and magnetic bubbles of M-type hexagonal ferrite BaFe$_{10.35}$Sc$_{1.6}$Mg$_{0.05}$O$_{19}$. The advantage of the hollow-cone Foucault method is that magnetic domains with various directions of magnetization can be visualized under an infocus condition. Moreover, the contrast of magnetic domain walls in magnetic bubbles depends on the inclination angle of the illumination beam. The combination of small-angle electron diffraction and hollow-cone Foucault imaging proves that magnetization at domain walls exhibits in-plane directions in the magnetic-striped domains and magnetic bubbles.
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