Energy-synchronized X-ray absorption spectroscopy photoemission electron microscopy at Shanghai Synchrotron Radiation Facility (SSRF) for materials science
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作者
Li, Junqin; Zhang, Guanhua; Sun, Julong; Zhao, Zilong; Zou, Ying; Chen, Zhenhua; Zhu, Fangyuan; Huang, Yaobo; Wang, Yong; Ren, Zefeng; Tai, Renzhong; Yang, Xueming
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刊物名称
JOURNAL OF SYNCHROTRON RADIATION
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年、卷、文献号
2025, ,
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关键词
Li, Junqin; Zhang, Guanhua; Sun, Julong; Zhao, Zilong; Zou, Ying; Chen, Zhenhua; Zhu, Fangyuan; Huang, Yaobo; Wang, Yong; Ren, Zefeng; Tai, Renzhong; Yang, Xueming
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摘要
This study develops an integrated X-ray absorption spectroscopy (XAS) photoemission electron microscopy (PEEM) platform on beamline BL09U at the Shanghai Synchrotron Radiation Facility (SSRF), enabling nanoscale characterization of complex materials through energy-resolved imaging and local-area XAS. By using the wide range of energy tunability, full access to different polarizations and PEEM's surface sensitivity, we have established a gap-monochromator control system under the EPICS framework to synchronize the elliptically polarized undulator (EPU) gap and monochromator energy dynamically, optimizing photon flux stability for absorption fine structure analysis. Combining X-ray magnetic circular dichroism (XMCD) and X-ray magnetic linear dichroism (XMLD) with PEEM and local-area XAS, this platform achieves concurrent mapping of electronic structures and magnetic domains in ferromagnetic nano-patterns, as demonstrated through our studies of Ni80Fe20 Permalloy using this system. The dual-modal approach bridges synchrotron radiation technology and surface science, offering nanometre-scale spatial resolution in XAS with magnetic domain sensitivity through linearly and circularly polarized X-ray excitation, providing researchers with advanced tools for functional materials analysis through synergistic XAS-PEEMtechniques and dynamic control systems.
