Structural and dielectric properties of Cu-doped α-ZnMoO4 ceramic system for enhanced green light emission and potential microwave applications

Tiwari, Sameer Kumar; Singh, Anterdipan; Yadav, Pritam; Sonu, Bibek Kumar; Verma, Ritesh; Rout, S. K.; Sinha, E.

doi:10.1007/s10854-020-04225-6

Cited by 9 publications

(2 citation statements)

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“…Indeed, the 3d(Zn 2+ )-subshell is filled, while the 3d 9 configuration of Cu 2+ makes it subject to the first-order Jahn-Teller distortion leading to tetragonal deformation of CuO 6 octahedra. The substitution modifies the electronic structure of molybdate by increasing its band gap [24] and leads to a disappearance of thermochromic properties, which are closely related to the local structure of molybdenum ions. The coordination of molybdenum ions changes from distorted octahedral at low-temperature in γ-Cu 0.90 Zn 0.10 MoO 4 solid solution to tetrahedral in α-Cu 0.90 Zn 0.10 MoO 4 above 250 K, similar to temperature or pressure-induced the γ-to-α phase transitions in CuMoO 4 [16].…”

Section: Msrd Factorsmentioning

confidence: 99%

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The influence of Zn$^{2+}$ ions on the local structure and thermochromic properties of Cu$_{1-x}$Zn$_x$MoO$_4$ solid solutions

Pudza,

Anspoks,

Cintins

et al. 2021

Preprint

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The influence of zinc ions on the thermochromic properties of polycrystalline Cu 1−x Zn x MoO 4 (x=0.10, 0.50, 0.90) solid solutions was studied by X-ray absorption spectroscopy at the Cu, Zn and Mo K-edges. Detailed structural information on the local environment of metal ions was obtained from the simultaneous analysis of EXAFS spectra measured at three metal absorption edges using the reverse Monte Carlo method. Thermochromic phase transition with the hysteretic behaviour between α and γ phases was observed in Cu 0.90 Zn 0.10 MoO 4 solid solution. It was found that the local environment of molybdenum ions is most susceptible to the substitution of copper for zinc and, upon cooling, transforms from tetrahedral MoO 4 to distorted octahedral MoO 6 .

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Section: Msrd Factorsmentioning

confidence: 99%

“…The substitution of copper with zinc produces a strong effect on thermochromic properties of copper molybdate by tuning its band gap from 2.78 eV in α-CuMoO 4 to 3.6 eV in α-ZnMoO 4 [24].…”

Section: Introductionmentioning

confidence: 99%