Temperature dependent electron paramagnetic resonance (EPR) of SrZrO

Gupta, Santosh K.; Pathak, Nimai; Ghosh, P. S.; Rajeshwari, B.; Natarajan, V.; Kadam, R.M.

doi:10.1016/j.jmmm.2015.04.108

Cited by 15 publications

(1 citation statement)

References 71 publications

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“…All the compounds showed an asymmetric signal at g ≈ 1.9967 which can be attributed to the paramagnetic singly charged oxygen vacancy (V O ̇). 49,55 It is worth to be noted here that all the positively charged defect centers will get stabilized through formation of a nearby negatively charged cationic vacancy such as V Mg // , V Al /// , Mg Al / and O i // etc. The figure also showed an increase in intensity of the resonance signal with increasing annealing temperature.…”

Section: +2mentioning

confidence: 99%

An Insight into the Various Defects-Induced Emission in MgAl₂O₄ and Their Tunability with Phase Behavior: Combined Experimental and Theoretical Approach

et al. 2016

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The present work describes various defects-induced tunable emission behavior of MgAl2O4 compounds obtained after annealing at different temperatures through a sol–gel combustion route. Multiple defect centers, such as F, F2, F+, and F2 2+ and different shallow and deep defects were found to be present inside the band gap, as confirmed by the lifetime and time-resolved emission spectroscopy (TRES) studies. The tunable emission characteristic at different annealing temperatures could be linked with the phase behavior of the spinel. Excitation wavelength variation suggested that a photoconversion process of F to F+ centers was involved with λex = 250 nm, followed by a trapping–de-trapping mechanism of the released electrons within different trap states. An exchange mechanism of electrons in between conduction band and shallow states was also observed at room temperature, which was absent at low temperature, as indicated by the emission profile. These observations render it to be a potential optical-based thermal sensor material. DFT-based calculations were carried out for both pure and various oxygen-vacancy-introduced spinel phases in order to characterize the different defect states inside the band gap. Finally, on the basis of theoretical and experimental results, a model has been proposed to explain the mechanisms related to emission tunability.

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Section: +2mentioning

confidence: 99%

An Insight into the Various Defects-Induced Emission in MgAl₂O₄ and Their Tunability with Phase Behavior: Combined Experimental and Theoretical Approach

et al. 2016

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EPR study on defect related magnetic centers in various oxide matrices

Pathak

2023

Defect-Induced Magnetism in Oxide Semiconductors

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Modified Solution Combustion Synthesis (SCS) of nickel oxide, NiO sphere clusters using glucans and sodium salts: Application for electrocatalytic decomposition of urea

Meguerdichian

Tasnim

Tabassum

et al. 2020

Microporous and Mesoporous Materials

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Temperature dependent electron paramagnetic resonance (EPR) of SrZrO

Cited by 15 publications

References 71 publications

An Insight into the Various Defects-Induced Emission in MgAl₂O₄ and Their Tunability with Phase Behavior: Combined Experimental and Theoretical Approach

An Insight into the Various Defects-Induced Emission in MgAl₂O₄ and Their Tunability with Phase Behavior: Combined Experimental and Theoretical Approach

EPR study on defect related magnetic centers in various oxide matrices

Modified Solution Combustion Synthesis (SCS) of nickel oxide, NiO sphere clusters using glucans and sodium salts: Application for electrocatalytic decomposition of urea

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Temperature dependent electron paramagnetic resonance (EPR) of SrZrO

Cited by 15 publications

References 71 publications

An Insight into the Various Defects-Induced Emission in MgAl2O4 and Their Tunability with Phase Behavior: Combined Experimental and Theoretical Approach

An Insight into the Various Defects-Induced Emission in MgAl2O4 and Their Tunability with Phase Behavior: Combined Experimental and Theoretical Approach

EPR study on defect related magnetic centers in various oxide matrices

Modified Solution Combustion Synthesis (SCS) of nickel oxide, NiO sphere clusters using glucans and sodium salts: Application for electrocatalytic decomposition of urea

Contact Info

Product

Resources

About

An Insight into the Various Defects-Induced Emission in MgAl₂O₄ and Their Tunability with Phase Behavior: Combined Experimental and Theoretical Approach

An Insight into the Various Defects-Induced Emission in MgAl₂O₄ and Their Tunability with Phase Behavior: Combined Experimental and Theoretical Approach