Raman scattering investigation of MnxFe1−xIn2S4 solid solutions

Guc, Maxim; Ursaki, V. V.; Bodnar, I. V.; Lozhkin, D. V.; Arushanov, E.; Izquierdo-Roca, Víctor; Pérez-Rodrı́guez, A.

doi:10.1016/j.matchemphys.2012.07.061

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Cited by 8 publications

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“…This suggests that some Cu 2þ is incorporated in tetrahedral sites resulting in the broadening of the A 1g mode, due to the contribution of two modes with very similar frequencies. 38 From x ¼ 0.7, C keeps increasing (Fig. 4), but more slowly.…”

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confidence: 94%

Local structure of CuxZn2−xTiO4 inverse spinel

Ruiz‐Fuertes

Bernert

et al. 2014

Applied Physics Letters

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Structural and vibrational changes due to the incorporation of Cu in the CuxZn2−xTiO4 inverse spinel solid solution have been investigated by X-ray diffraction, Raman spectroscopy, and ab initio calculations. Both X-ray diffraction and Raman spectroscopy show that the structure remains cubic while the unit-cell volume decreases on Cu2+ incorporation. The compositional dependencies of the Raman frequencies and linewidths indicate the incorporation of Cu2+ into tetrahedral sites. The A1g tetrahedral mode frequency becomes independent on composition for x > 0.6. This is attributed to the limited incorporation of Cu2+ in the tetrahedral sites at Cu-rich compositions. Ab initio calculations with quasi-random structures reveal only a slight energetic preference of Cu2+ for octahedral over tetrahedral sites.

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confidence: 94%