电子涡旋束在磁性物质中的弹性散射
Elastic scattering of electron vortex beams in magnetic matter
摘要：
电子涡旋束在磁性材料上的弹性散射，由于电子涡旋束的轨道角动量与样品中的磁场的塞曼相互作用，导致了弱的磁衬度。磁信号本身表现为由于轨道角动量的符号变化而导致的衍射图案中的强度的重新分布。而在原子分辨率制度的磁信号是最有可能在目前的透射电子显微镜的检测极限，为电子探针与高轨道角动量，相应的更大的空间范围，其检测被预测是可行的。
英文摘要：
Elastic scattering of electron vortex beams on magnetic materials leads to a weak magnetic contrast due to Zeeman interaction of orbital angular momentum of the beam with magnetic fields in the sample. The magnetic signal manifests itself as a redistribution of intensity in diffraction patterns due to a change of sign of the orbital angular moment. While in the atomic resolution regime the magnetic signal is most likely under the detection limits of present transmission electron microscopes, for electron probes with high orbital angular momenta, and correspondingly larger spatial extent, its detection is predicted to be feasible.
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