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MM: Fachverband Metall- und Materialphysik
MM 21: Interface Controlled Properties, Nanomaterials and Microstructure Design
MM 21.7: Vortrag
Mittwoch, 19. März 2025, 17:15–17:30, H22
Ce-doped Ni-based nanocrystal ribbons for Near-Perfect Infrared Absorbers — •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 — 2Institute of Materials Science Nanotechnology and National Nanotechnology Research Center (UNAM) Bilkent University Ankara 06800, Türkiye — 3Department of Engineering Fundamental Sciences, Sivas University of Science and Technology, 58000 Sivas, Turkey
Absorption properties of Ni-based ribbons prepared with a composition of 75 % Ni, 10 % Cr, 8 % Si, 5 % Fe, 2 % B, and %1 Ce-doped were investigated in the infrared region. The ribbons were prepared by melt spinning, and the samples exhibited a nanocrystalline structure due to rapid solidification. The total absorbing effectiveness of the Ni-based ribbons reached a maximum of about %93 at 3-5 *m mid-wave infrared (mid-IR) window when the ribbons were doped with Ce causing an approximate 5% improvement in the mid-IR absorption. Overall, the composite films provide over 80% IR absorption at the wavelengths from 3 *m to 25 *m. Due to the superparamagnetic behavior of the Ni-based composite film suggesting a decrease in electrical conductivity, a high impedance allows such high IR absorption over a large EM spectrum. This indicates that Ce-doped Ni composite film can be a good candidate for thermal emitters and infrared imaging, and for integrating into small-pixel uncooled infrared detectors.
Keywords: Near-perfect IR absorber; superparamagnetism; Ni-based composite; Ce-doped nanoribbons; infrared imaging