A comparative study on the structural, optical, and magnetic behavior of transition metal (Co and Mn) ions substituted Cr2O3 nanoparticles

Bhardwaj, Pradeep; Kumar, Rajesh; Singh, Jarnail; Verma, Vikram; Kumar, Ravi

doi:10.1016/j.jmmm.2022.170247

Cited by 5 publications

(3 citation statements)

References 45 publications

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“…Based on the optical absorption spectra, the optical band gap of the considered glasses was deduced according to Mott-Davis theory using the following equation 9 , 10 , 14 , 24 . where , , , are the absorption coefficient, the incident photon energy, the band tailing parameter, and the optical band gap energy respectively.…”

Section: Experimental and Theoretical Aspectsmentioning

confidence: 99%

“…To measure the disorder degree in the considered glasses, the band tail, which known as Urbach energy was estimated through the following equation 9 , 10 , 14 , 24 . where β is a constant.…”

Section: Experimental and Theoretical Aspectsmentioning

confidence: 99%

“…From the photoluminescence point of view, TMIs generate broad emission bands that have an adjustable wavelength and appropriate quantum yield 7 , 8 . Electrically and magnetically, the multiple oxidation states of the TMIs bring substantial modifications in the glass networks structural units by influencing the charge degree of freedom and spin, which in turn directly affect the conduction process and the electrical and magnetic nature of the glass network 9 , 10 . Hence, glass-containing TMIs have significant applications in photonics, electronic, optoelectronics, and magnetic domains such as light emitting diodes, optical filters, solid-state lasers, memory-switching electronics, superionic batteries, catalysis, smart electronic devices, and magnetic information storage 11 – 13 .…”

Section: Introductionmentioning

confidence: 99%

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The effect of cobalt/copper ions on the structural, thermal, optical, and emission properties of erbium zinc lead borate glasses

Taha

Saeed

2023

Sci Rep

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A host glass network of 70B2O3–10Pb3O4–18ZnO–2Er2O3 (ErCoCu1) was proposed and the impact of 1 mol% of Co or/and Cu ions on its structural, thermal, optical, and green emission properties was studied extensively. The X-ray diffraction spectra confirmed the amorphous structure of the produced glasses. Density and density-based parameters behavior showed that the Co or/and Cu ions fill the interstitial positions of the proposed ErCoCu1 network, causing its compactness. Both ATR-FTIR and Raman Spectra affirmed the formation of the fundamental structural units of the borate network, B–O–B linkage, BO3, and BO4. Additionally, the penetration of Co or/and Cu ions inside the ErCoCu1 converts the tetrahedral BO4 units to triangle BO3 causing its richness by non-bridging oxygens. The addition of Co or/and Cu reduces the glass transition temperature as a result of the conversion of the BO4 to BO3 units. Optical absorption spectra for the host glass ErCoCu1 showed many of the distinguished absorption bands of the Er3+ ion. Penetration of Co ion generates two broadbands referring to the presence of Co2+ ions in both tetrahedral and octahedral coordination and Co3+ ions in the tetrahedral coordination. In the Cu-doped glasses, the characteristic absorption bands of Cu2+ and Cu+ were observed. A green emission was generated from the ErCoCu1 glass under 380 nm excitation wavelength. Moreover, no significant effect of Co or/and Cu on the emission spectra was recorded. The considered glasses had appropriate properties qualifying them for optoelectronics and nonlinear optics applications.

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