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MA: Fachverband Magnetismus
MA 42: Molecular Magnetism and Magnetic Particles / Clusters II
MA 42.9: Vortrag
Donnerstag, 12. März 2026, 11:45–12:00, HSZ/0004
Investigation of Magnetic Properties of Ce-Doped Ni-Based Composites as Near Infrared Absorbers Based on Soft-XAS and XMCD Measurements — •Timuçin Emre Tabaru1, Ali Karatutlu2, Iremnur Duru1, and M. Fatih Kilicaslan3 — 1Department of Electrical Electronics Engineering, Sivas University of Science and Technology, 58000 Sivas, Turkey — 2National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Türkiye — 3Department of Engineering Fundamental Sciences, Sivas University of Science and Technology, 58000 Sivas, Turkey
In this study, the X-ray Magnetism Circular Dichroism (XMCD) spectra of Ni-based composites produced by melt spinning and rapid solidification with ~75% Ni, ~10% Cr, ~8% Si, ~5% Fe, ~2% B, and 1% Ce doping were determined according to different Fe and Cerium (Ce) contents using soft X-ray absorption spectroscopy (XAS) at the HESEB beamline at the Synchrotron-Light For Experimental Science And Applications In The Middle East (SESAME). The L2 and L3 edges of Ni, Fe, and Ce were investigated for both Ce-doped and undoped samples. The areas under the XAS and XMCD spectra obtained from these measurements were determined, and the spin and orbital magnetic momenta of each sample were calculated. The results confirmed that the materials mentioned exhibit paramagnetic properties, in agreement with the literature. Ni-based composite doped with Ce demonstrated enhanced broadband infrared (IR) absorption, reaching a maximum efficiency of 93% in the 3-5 μm mid-IR window and maintaining over 80% absorption across the entire 3-15 μm spectral range.
Keywords: Near-perfect IR absorber; Paramagnetism; Ni-based composite; Ce-doped materials