Geometrically defined spin structures in ultrathin Fe3O4 with bulk like magnetic properties
Geometrically defined spin structures in ultrathin Fe3O4 with bulk like magnetic properties
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DOI：
10.1039/c7nr07143d
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发表时间：
2018-03-28
期刊：
影响因子：
6.7
通讯作者：
de la Figuera, Juan
中科院分区：
文献类型：
--
作者：
Ruiz-Gomez, Sandra;Perez, Lucas;de la Figuera, Juan
我们通过反应性分子束外延在Ru（0001）上生长出无反相边界的高质量磁铁矿微晶体，保持了20 nm厚度以下的体磁性能。利用x射线光谱显微镜获得了磁化矢量图，并与微磁模拟进行了比较。观察到的畴结构完全由形状各向异性决定，克服了（磁）晶体各向异性和缺陷的可能影响，从而证明了在超薄、磁性软磁铁矿中随意设计自旋结构的可能性。
We have grown high quality magnetite microcrystals free from antiphase boundaries on Ru(0001) by reactive molecular beam epitaxy, conserving bulk magnetic properties below 20 nm thickness. Magnetization vector maps are obtained by X-ray spectromicroscopy and compared with micromagnetic simulations. The observed domain configurations are dictated purely by shape anisotropy, overcoming the possible influences of (magneto) crystalline anisotropy and defects, thus demonstrating the possibility of designing spin structures in ultrathin, magnetically soft magnetite at will.