Vibrational, EPR and optical spectroscopy of the Cu2+ doped glasses with (90–x)TeO2–10GeO2–xWO3 (7.5 ≤ x ≤ 30) composition

Upender, G.; Prasad, M.; Mouli, V. Chandra

doi:10.1016/j.jnoncrysol.2010.12.001

Cited by 35 publications

(14 citation statements)

References 43 publications

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“…The transition metal oxide such as CuO is chosen in the present investigation because it exists in two different valence states i.e. monovalent Cu 1+ and divalent Cu 2+ and that it can also represent as CuO 4 and CuO 6 in the glass network [15,16]. Many researchers have reported that the addition of CuO in the glass structure makes the glass electrically semiconducting and super paramagnetic [17,18].…”

Section: Introductionmentioning

confidence: 99%

Effect of alkaline earths on spectroscopic and structural properties of Cu2+ ions-doped lithium borate glasses

Bhogi

Kumar

Kistaiah

2015

Journal of Non-Crystalline Solids

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Section: Introductionmentioning

confidence: 99%

Effect of alkaline earths on spectroscopic and structural properties of Cu2+ ions-doped lithium borate glasses

Bhogi

Kumar

Kistaiah

2015

Journal of Non-Crystalline Solids

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“…Copper free sample exhibits no EPR signal, i.e., all the obtained EPR spectra are due to Cu +2 . Each spectrum was analyzed using the axial spin Hamiltonian [19][20][21][22]: H=β(g // H z s z )+ βg ┴ (H x s x +H y s y )+A // s z I z +A ┴ (s x I x +s y I y )…”

Section: Spectrum Of Eprmentioning

confidence: 99%

A Study of Electron Paramagnetic Resonance on Copper Ions on Alkali-Alkali Earth Zinc Phosphate Glass

Mokhtar¹

2015

AJPA

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42%P 2 O 5 -40%ZnO-2%CaO-(16-x) %Na 2 O-xCu 2 O glass system (x=o, 2, 4, 6, 8, 10%mol) were prepared by conventional melt-quenching technique. It was investigated by means of electron paramagnetic resonance (EPR) to study the structural changes induced by different amount of copper ions. The spin Hamiltonian parameters like g∥ , g⊥ and A∥ show that Cu +2 ionare in tetrahedral coordination with d xy as the ground state. Modification of EPR band width by increasing copper content suggests that band consists of two overlapping bands; one of them is related to asymmetric band due to isolated copper ions and the other is symmetric due to cluster ions Cu +2 -Cu +2 . Calculation of the optical basicity indicates to that polarizability decrease by increasing copper content due to increase electron cloud density at the Cu 2+ site.

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“…Copper ions have been frequently used as paramagnetic probes for exploring the structure and properties of glasses. A large number of interesting studies are available on the environment of copper ion in glasses (Colak, and Aral, 2011;Padlyak et al, 2010;Prasad & Veeraiah, 2005;Rao, Reddy, Rao, & Veeraiah, 2009;Upender, Prasad, Mouli, & Chandra, 2011).…”

Section: Introductionmentioning

confidence: 99%

Optical and magnetic properties of Cu/SiO2 composite films prepared via γ-irradiation route

Abd-Elaziz

Elalaily

Ezz-Eldin

2015

Journal of Radiation Research and Applied Sciences

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SiO 2 gel film g-IrradiationHeat-treatment UV-visible XRD EPR a b s t r a c t In the present radiolytic study, we report the formation of Cu þ2 ions in a solegel SiO 2 thin film via g-irradiation. The optical and magnetic properties of Cu/SiO 2 film are discussed in relation to the mechanism of the formation of Cu þ2 ions through irradiation. The color of the treated Cu/SiO 2 films swinging from faint green to dark blue as the concentration of Cu(NO 3 ) 2 solution was increased from 0.2 to 0.6 and then decreased at 1.2 mol/L. The absorption spectra of the samples revealed many identified broad absorption bands in both, UV (~190e280 nm) and, in the visible region (~360e530 and~600e740 nm) beside a shallow broad ones in near infrared (~800e880 nm). Also, there are remarkable increases in the absorption intensities accompanying with red shift for the heat-treated samples soaked in 1.2 mol/L. In order to study the state of Cu 2þ , and confirm the influence of the matrix, by investigating their EPR and XRD spectroscopy, respectively.

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Vibrational, EPR and optical spectroscopy of the Cu2+ doped glasses with (90–x)TeO2–10GeO2–xWO3 (7.5 ≤ x ≤ 30) composition

Cited by 35 publications

References 43 publications

Effect of alkaline earths on spectroscopic and structural properties of Cu2+ ions-doped lithium borate glasses

Effect of alkaline earths on spectroscopic and structural properties of Cu2+ ions-doped lithium borate glasses

A Study of Electron Paramagnetic Resonance on Copper Ions on Alkali-Alkali Earth Zinc Phosphate Glass

Optical and magnetic properties of Cu/SiO2 composite films prepared via γ-irradiation route

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