Structural disorder in geometrically frustrated Yb₂ZrₓTi₂₋ₓO₇
收藏ESRF Portal2028-01-01 更新2026-04-23 收录
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https://doi.esrf.fr/10.15151/ESRF-ES-2214252194
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资源简介：
The compound Yb₂Ti₂O₇ undergoes a structural transition from pyrochlore to defect fluorite as Ti is substituted by Zr, resulting in the novel series Yb₂ZrₓTi₂₋ₓO₇. We propose an X-ray Pair-distribution Function (XPDF) and a High-resolution X-ray Diffraction (HXRD) analysis of powder samples to characterize the local and long-range structural order in these compounds. Previous X-ray diffraction experiments using Cu Kα radiation revealed weak reflections corresponding to the pyrochlore superstructure in our fluorite samples, whereas Raman spectroscopy indicates the presence of local pyrochlore order. It remains unclear whether these weak reflections arise from correlations among atoms within the fluorite phase or from spatially localized pyrochlore domains embedded in a fluorite matrix. Improved structural knowledge will provide crucial insights for understanding the magnetic ground state of these materials.
提供机构：
University of Sao Paulo, Low Temperature and State Solid Laboratory, rua do Matão, nº 1317, Cidade Universitária , Dep. Of Physics Of Materials And Mechanics In, 05508-090 Sao Paulo, Brasil
创建时间：
2028-01-01
