A study on the relationship of magnetic moments orientation in L10 FePt network nanostructured film by electron energy-loss magnetic chiral dichroism using semi-core excitation spectra
A study on the relationship of magnetic moments orientation in L10 FePt network nanostructured film by electron energy-loss magnetic chiral dichroism using semi-core excitation spectra
复制标题
利用半核激发光谱电子能量损失磁手性二向色性研究L10 FePt网络纳米结构薄膜中磁矩取向关系
DOI：
10.1016/j.jmmm.2022.169522
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发表时间：
2022
影响因子：
2.7
通讯作者：
Muto Shunsuke
中科院分区：
文献类型：
--
作者：
Makino Hitoshi;Rusz Jan;Wang Jian;Turenne Diego;Ohtsuka Masahiro;Takahashi Yukiko K.;Durr Hermann A.;Muto Shunsuke
在这项研究中，我们应用电子能量损失磁性手征二向色性（EMCD），一种电子对应的X射线磁性圆二向色性（XMCD），到一个网络纳米结构的FePt L10有序合金薄膜，以检查相邻的Fe和Pt原子之间的磁矩的相对取向使用Fe-M2，3，Pt-O2，3，和Pt-N6，7半芯激发光谱与透射电子显微镜和电子能量损失谱。EMCD信号成功地提取了大量的光谱使用专用的数据分析程序，以获得足够的噪声统计。结果表明，当相邻的Fe和Pt之间存在平行磁矩时，Fe和Pt吸收边的EMCD信号的相对符号关系与理论介电张量的符号关系一致.我们相信这项研究的结果可以应用到不同的纳米结构的合金，以确定是否自旋配置取决于纳米结构的大小和几何形状。
In this study, we applied electron energy-loss magnetic chiral dichroism (EMCD), an electron counterpart of X-ray magnetic circular dichroism (XMCD), to a network nanostructured FePt L10ordered alloy film to examine the relative orientation of magnetic moments between neighboring Fe and Pt atoms using the Fe-M2,3, Pt-O2,3, and Pt-N6,7semi-core excitation spectra with transmission electron microscopy and electron energy-loss spectroscopy. EMCD signals were successfully extracted from a large number of spectra using a dedicated data analysis procedure to obtain sufficient noise statistics. Results showed that the relative sign relation of the EMCD signals between the Fe and Pt absorption edges was consistent with that of the theoretical dielectric tensor while assuming that parallel magnetic moments exist between neighboring Fe and Pt. We believe the results of this study can be applied to alloys with different nanostructures to determine whether the spin configuration depends on the size and geometry of the nanostructures.