Hauptseite > Publikationsdatenbank > Prospect for measuring two-dimensional van der Waals magnets by electron magnetic chiral dichroism > print

001     906055
005     20230522125348.0
024 7 _ |a 10.1016/j.ultramic.2022.113476
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024 7 _ |a 1879-2723
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024 7 _ |a 2128/30675
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037 _ _ |a FZJ-2022-01199
041 _ _ |a English
082 _ _ |a 570
100 1 _ |a Song, Dongsheng
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245 _ _ |a Prospect for measuring two-dimensional van der Waals magnets by electron magnetic chiral dichroism
260 _ _ |a Amsterdam
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|b Elsevier Science
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520 _ _ |a Two-dimensional (2D) van der Waals magnets have drawn considerable attention in recent years triggered by the huge interest in novel magnetism and spintronic devices. Magnetic measurement of 2D van der Waals (vdW) magnets is crucial to understand the physical origin of magnetism in 2D limits. Therefore, advanced magnetic characterization techniques are highly required. However, only a limited number of such techniques are available due to the extremely small volume of 2D vdW magnets. Here, we introduce the electron magnetic chiral dichroism (EMCD) technique in transmission electron microscope (TEM) to measure 2D vdW crystals. In comparison with some other already-employed techniques in 2D magnets, EMCD is able to quantitatively measure magnetic parameters in three orthogonal directions at nanometer or even at atomic scale. We then perform EMCD simulations on several typical 2D vdW magnets with respect to the accelerating voltage, the number of atomic layers and beam tilt under zone axial orientation. The intensity and distribution of EMCD signals in three orthogonal directions are given in the diffraction plane, thereby providing an optimized design to achieve EMCD measurements. Finally, we discuss the signal-to-noise-ratio and required electron dose in order to obtain a measurable EMCD signal for 2D vdW magnets. Our results provide a feasibility analysis and guideline to measure 2D vdW magnets in future experiments.
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536 _ _ |a 3D MAGiC - Three-dimensional magnetization textures: Discovery and control on the nanoscale (856538)
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700 1 _ |a Zheng, Fengshan
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700 1 _ |a Dunin-Borkowski, Rafal E.
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773 _ _ |a 10.1016/j.ultramic.2022.113476
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856 4 _ |y OpenAccess
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