Element-Specific Magnetic Domain Imaging in Room-Temperature 2D Ferromagnet Fe₃GaTe₂ Using STXM-XMCD at TPS 27A1

Hung Wei Shiu^1*, Wan-Ting Chen¹, Su-Ling Cheng¹, Yao-Jane Hsu¹, Way-Faung Pong², Chuan-Che Hsu³

¹Nano Science, National Synchrotron Radiation Research Center, Hsinchu, Taiwan
²Physics, Tamkang University, New Taipei City, Taiwan
³Physics, Chung Yuan Christian University, Taoyuan, Taiwan

* Presenter:Hung Wei Shiu, email:hwshiu@nsrrc.org.tw

The TPS 27A1 beamline at the Taiwan Photon Source (TPS) provides advanced capabilities for scanning transmission X-ray microscopy (STXM) with high spatial and energy resolution. It is equipped with an active-mirror plane grating monochromator (AM-PGM) covering a wide photon energy range from 90 to 3000 eV. Of particular interest for magnetic studies is the circularly polarized soft X-ray range from 150 to 1000 eV, which spans the L-edges of common 3d magnetic elements such as Fe, Co, and Ni. This configuration enables element-specific X-ray magnetic circular dichroism (XMCD) imaging and spectroscopy, making it highly suitable for studying complex magnetic systems.

In this presentation, we demonstrate the STXM-based XMCD imaging and spectroscopy performance using a two dimensional room temperature ferromagnet, Fe₃GaTe₂, as a model system. The sample exhibits stripe-like magnetic domain structures, which are clearly resolved in the XMCD contrast images. In addition, spatially resolved XAS and XMCD spectra highlight the capability to correlate chemical and magnetic features at the nanoscale. These results illustrate the strong potential of TPS 27A1 STXM for advanced magnetic spectromicroscopy and underscore its relevance for emerging low dimensional spintronic materials.

Keywords: XMCD, STXM, Magnetic domain, Synchrotron