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Instruments / Technical Area	Publication Details	Published	Actions
I10-Beamline for Advanced Dichroism - scattering	Electron beam lithography of magnetic skyrmions Yao Guang , Yong Peng , Zhengren Yan , Yizhou Liu , Junwei Zhang , Xue Zeng , Senfu Zhang , Shilei Zhang , David M. Burn , Nicolas Jaouen , Jinwu Wei , Hongjun Xu , Jiafeng Feng , Chi Fang , Gerrit Van Der Laan , Thorsten Hesjedal , Baoshan Cui , Xixiang Zhang , Guoqiang Yu , Xiufeng Han Advanced Materials DOI: 10.1002/adma.202003003 Diamond Proposal Number(s): [20183, 21868] Show Abstract ▼ Abstract: The emergence of magnetic skyrmions, topological spin textures, has aroused tremendous interest in studying the rich physics related to their topology. While skyrmions promise high‐density and energy‐efficient magnetic memory devices for information technology, the manifestation of their nontrivial topology through single skyrmions and ordered and disordered skyrmion lattices could also give rise to many fascinating physical phenomena, such as chiral magnon and skyrmion glass states. Therefore, generating skyrmions at designated locations on a large scale, while controlling the skyrmion patterns, is the key to advancing topological magnetism. Here, a new, yet general, approach to the “printing” of skyrmions with zero‐field stability in arbitrary patterns on a massive scale in exchange‐biased magnetic multilayers is presented. By exploiting the fact that the antiferromagnetic order can be reconfigured by local thermal excitations, a focused electron beam with a graphic pattern generator to “print” skyrmions is used, which is referred to as skyrmion lithography. This work provides a route to design arbitrary skyrmion patterns, thereby establishing the foundation for further exploration of topological magnetism.	Aug 2020
I10-Beamline for Advanced Dichroism - scattering	Superposition of emergent monopole and antimonopole in CoTb thin films Yao Guang , Kejing Ran , Junwei Zhang , Yizhou Liu , Senfu Zhang , Xuepeng Qiu , Yong Peng , Xixiang Zhang , Markus Weigand , Joachim Gräfe , Gisela Schütz , Gerrit Van Der Laan , Thorsten Hesjedal , Shilei Zhang , Guoqiang Yu , Xiufeng Han Physical Review Letters 127 DOI: 10.1103/PhysRevLett.127.217201 Diamond Proposal Number(s): [23785] Show Abstract ▼ Abstract: A three-dimensional singular point that consists of two oppositely aligned emergent monopoles is identified in continuous CoTb thin films, as confirmed by complementary techniques of resonant elastic x-ray scattering, Lorentz transmission electron microscopy, and scanning transmission x-ray microscopy. This new type of topological defect can be regarded as a superposition of an emergent magnetic monopole and an antimonopole, around which the source and drain of the magnetic flux overlap in space. We experimentally prove that the observed spin twist seen in Lorentz transmission electron microscopy reveals the cross section of the superimposed three-dimensional structure, providing a straightforward strategy for the observation of magnetic singularities. Such a quasiparticle provides an excellent platform for studying the rich physics of emergent electromagnetism.	Nov 2021

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