Matches in SemOpenAlex for { <https://semopenalex.org/work/W4313251508> ?p ?o ?g. }
- W4313251508 abstract "While the unique geometrical frustration of pyrochlore Yb2Ti2O7 has attracted attention, the dielectric and other properties of this pyrochlore beyond frustrated magnetism are not well understood. Here, we report on the fascinating low-temperature dielectric relaxation of Yb2-xBaxTi2O7-δ (x = 0–0.20) and demonstrate that this phenomenon is related to structural distortion. A-site Ba substitution, which increases the density of point defects and introduces a different atomic radius, enhances the chemical disorder and structural distortion. As a result, the increases in oxygen vacancies and nonmagnetic Ba2+ and Yb2+ ions dilute the ferromagnetic Yb3+–Yb3+ interactions, as indicated by the decrease in effective magnetic moment. On the other hand, the distorted octahedra facilitate the hopping of Yb ions, and the random distribution of Ba2+ ions at the Yb3+ sites gives rise to additional random fields, leading to significantly increased dielectric relaxation. The room-temperature dielectric constant is improved to ∼170, twice that of pristine Yb2Ti2O7. This work provides a comprehensive view of the structural, magnetic, and dielectric properties of Yb2Ti2O7 and lays the foundation for additional research into pyrochlore compounds." @default.
- W4313251508 created "2023-01-06" @default.
- W4313251508 creator A5025996108 @default.
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- W4313251508 date "2022-12-26" @default.
- W4313251508 modified "2023-09-27" @default.
- W4313251508 title "Tailoring magnetic and dielectric properties of Yb2Ti2O7 pyrochlore through structural distortion" @default.
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- W4313251508 doi "https://doi.org/10.1063/5.0127341" @default.
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