Atomic scale imaging of magnetic circular dichroism by achromatic electron microscopy
Atomic scale imaging of magnetic circular dichroism by achromatic electron microscopy
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消色差电子显微镜磁圆二色性的原子尺度成像
DOI：
10.1038/s41563-017-0010-4
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发表时间：
2018
期刊：
影响因子：
41.2
通讯作者：
Xiaoyan Zhong
中科院分区：
文献类型：
--
作者：
Zechao Wang;Amir H Tavabi;Lei Jin;Ján Rusz;Dmitry Tyutyunnikov;Hanbo Jiang;Yutaka Moritomo;Joachim Mayer;Rafal E. Dunin-Borkowski;Rong Yu;Jing Zhu;Xiaoyan Zhong
为了获得磁性材料中电荷、自旋、轨道和晶格自由度之间相互作用的基本理解，并预测和控制它们的物理性质，需要能够以原子尺度的空间分辨率访问局部磁性信息的实验技术。在这里，我们证明了电子能量损失磁手性二色性和色差校正透射电子显微镜的结合，与单独使用球差校正相比，减少了非弹性散射电子的焦扩散数量级，可以实现磁圆二色性的原子尺度成像，并提供原子平面上的元素选择性轨道和自旋磁矩。我们为Sr2FeMoO6展示的这种独特能力，为在多种表现出不同类型磁耦合的材料中进行自旋构型的局部原子水平研究打开了大门，从而有助于在最高空间分辨率下详细了解材料磁性的物理起源。
In order to obtain a fundamental understanding of the interplay between charge, spin, orbital and lattice degrees of freedom in magnetic materials and to predict and control their physical properties, –, experimental techniques are required that are capable of accessing local magnetic information with atomic-scale spatial resolution. Here, we show that a combination of electron energy-loss magnetic chiral dichroism and chromatic-aberration-corrected transmission electron microscopy, which reduces the focal spread of inelastically scattered electrons by orders of magnitude when compared with the use of spherical aberration correction alone, can achieve atomic-scale imaging of magnetic circular dichroism and provide element-selective orbital and spin magnetic moments atomic plane by atomic plane. This unique capability, which we demonstrate for Sr2FeMoO6, opens the door to local atomic-level studies of spin configurations in a multitude of materials that exhibit different types of magnetic coupling, thereby contributing to a detailed understanding of the physical origins of magnetic properties of materials at the highest spatial resolution.