Electronic structure of YbFe4Al8 antiferromagnet: A combined X-ray photoelectron spectroscopy and first-principles study

Marciniak, Włodzimierz; Chełkowska, G.; Bajorek, A.; Kowałczyk, A.; Szajek, A.; Werwiński, Mirosław

doi:10.1016/j.jallcom.2022.164478

Cited by 1 publication

(1 citation statement)

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“…Besides, two weaker peaks at 197 and 204 eV can be attributed to the 4d 5/2 and 4d 3/2 orbitals of Yb 3+ . [23] Moreover, the high-resolution XPS curve of Mn 2p in Figure 1e confirms the divalent valence state of Mn, as indicated by the observed peaks at 643 and 652 eV, corresponding to the 2p 3/2 and 2p 1/2 orbitals of the Mn 2+ ions. [24] The partial scanning electron microscope (SEM) image and energy dispersion spectrum (EDS) with the elemental distribution mapping of the MgF 2 :Yb 2+ , Mn 2+ samples are provided in Figure S4 (Supporting Information), which present the uniform distribution of the corresponding elements, displaying that Yb 2+ and Mn 2+ ions are successfully incorporated into the MgF 2 lattice.…”

Section: Resultssupporting

confidence: 59%

Visual Representation of the Stress Distribution with a Color‐Manipulated Mechanoluminescence of Fluoride for Structural Mechanics

Guo,

Xia,

Wang

et al. 2023

Adv Funct Materials

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Mechanoluminescence (ML) materials are capable of converting applied stress into luminescent signals, and offer fascinating potential applications in biomedicine, safety testing, structural diagnosis, and mechanical sensing. Color‐responsive ML sensing, combined with quantitative evaluation of loaded stress, is preferred for visual description and sensing reliability. In this work, Yb2+ and Mn2+ ions co‐doped MgF2 with a fascinating ratiometric ML performance are successfully explored. ML color can be manipulated based on the distinct stress‐dependent ML intensity of the activators. Furthermore, a self‐activated orange persistent ML is observed even after the removal of the mechanics stimuli, allowing a delayed stress sensing with the memorized optical signals. Accordingly, a visualized stress sensing with the as‐explored ML composites using the ultraviolet curing 3D printing technique is demonstrated for structural mechanics. Herein, a feasible optical description of the loaded stress distribution in space for objects free from concerns with dimensions and geometrical shapes can be realized, benefiting the study of 3D structural mechanics, especially for complex structures.

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Section: Resultssupporting

confidence: 59%