Authors
Junqin Li, Guanhua Zhang, Julong Sun, Zilong Zhao, Ying Zou, Zhenhua Chen, Fangyuan Zhu, Yaobo Huang, Yong Wang, Zefeng Ren, Renzhong Tai, Xueming Yang
Published in
Journal of synchrotron radiation. Nov 01, 2025. Epub Nov 01, 2025.
Abstract
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-PEEM techniques and dynamic control systems.
PMID:
40928649
Bibliographic data and abstract were imported from PubMed on 10 Sep 2025.
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