Diminished spin-flip reflectivity in stacked multilayers with varying period thicknesses of Fe/Si by incorporating 11B4C

• DOI: 10.48550/arxiv.2502.07512
• Publication Date: 2025-02-11
• Authors: Anton Zubayer; Naureen Ghafoor; Anton Devishvili; A. Vorobiev; Artur Glavic; Jochen Stahn; Τakayasu Hanashima; Jun Sugiyama; Vitor A. de Olive...; Jens Birch; Fredrik Eriksson
• Keywords: Condensed Matter - Materials Science; Materials Science (cond-mat.mtrl-sci); FOS: Physical sciences

This study investigates the effects of 11B4C co-sputtering on structural and optical properties Fe/Si stacked multilayers, with a focus neutron supermirror applications. X-ray reflectivity techniques reveal that incorporation improves interface sharpness, reduces roughness, enhances for all multilayer periods. Neutron measurements show reduced spin-flip intensities, while wafer-curvature indicate 50% reduction in internal stress, allowing higher mechanical stability multilayers. These improvements are attributed to amorphization Fe layers, which also suppress formation magnetic domains responsible stress scattering. In contrast, pure sample exhibits persistent half-order Bragg peak, indicating residual antiferromagnetic coupling. The results demonstrate optics by reducing effects, increasing polarization, alleviating enabling use polarizers at external fields compared findings establish as transformative material advancing technology, paving way more efficient, stable, high-performance next-generation optics.