Structural and optical characterization of Er-alkali-metals codoped MgO nanoparticles synthesized by solution combustion route

Sivasankari, J.; Sellaiyan, S.; Lee, Sejoon; Devi, L. Vimala; Sivaji, K.

doi:10.1016/j.physe.2016.08.025

Cited by 10 publications

(7 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Feng Gu [10] synthesized Eu:MgO nanocrystals in the form of powders using the SCM, and the photoluminescence intensity and crystallinity were enhanced after introducing Li as a co-dopant. Sivasankari [11] studied alkali co-doped (Na, K, and Li) Er: MgO. Their nanopowder samples were synthesised using the SCM as well.…”

Section: Introductionmentioning

confidence: 99%

Atomistic Simulations of Defect Structures in Rare-Earth-Doped Magnesium Oxide

Zhao,

Cormack,

2024

Crystals

View full text Add to dashboard Cite

Point defects induced by doping rare earth elements (RE) (Nd and Er) into a magnesium oxide host were investigated via classical atomistic simulations utilising the General Utility Lattice Program (GULP). Formation and association energies were calculated for the potential defect structures. Both isolated defects and defect complexes were considered. The most energetically favourable structures of defect complexes were found for rare-earth-doped and Li co-doped systems. The correlation between the association energy and the structure of the defect complex was investigated. The influences of Li were revealed with respect to energy and structure. The simulation results contribute to the understanding of the point defects of doped MgO and how Li influences the doping of rare earth elements in the MgO host.

show abstract

Section: Introductionmentioning

confidence: 99%

Atomistic Simulations of Defect Structures in Rare-Earth-Doped Magnesium Oxide

Zhao,

Cormack,

2024

Crystals

View full text Add to dashboard Cite

show abstract

“…Feng Gu [10] synthesised Eu: MgO nanocrystallites with the combustion method, and the photoluminescence intensity and crystallinity were enhanced after introducing Li as a co-dopant. Sivasankari [11] studied alkali co-doped (Na, K, Li) Er: MgO. The sample with Li co-dopant was found to have smaller FWHM (Full Width at Half Maximum) values, with peak profile changes in the X-ray diffraction pattern, indicating that the crystallinity was improved.…”

Section: Introductionmentioning

confidence: 99%

Atomistic Simulations of Defect Structures in Rare Earth Doped Magnesium Oxide

Zhao,

Cormack,

2024

Preprint

View full text Add to dashboard Cite

Point defects induced by doping rare earth elements RE (Nd, Er) into the magnesium oxide host were investigated by classical atomistic simulations utilising the General Utility Lattice Program (GULP). Formation and association energies were calculated for the potential defect structures. Both isolated defects and defect complexes were considered. The most energetically favourable structures of defect complexes were found for rare earth doped and Li co-doped systems. The correlation between the association energy and the structure of the defect complex was investigated. The influences of Li were revealed with respect to energy and structure. The simulation results contribute to the understanding of the point defects of doped MgO and how Li influences the doping of rare earth elements in the MgO host.

show abstract

“…Kumar et al [ 15 ] and Li et al [ 16 ] have shown that possibly the existence of oxygen vacancies and adsorbed H

species are important for the appearance of RTFM in MgO nanocrystals or thin films, respectively. Ion doping also influences the optical and electro-optical properties of MgO NPs [ 17 , 18 , 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Magnetic, Optical and Phonon Properties of Ion-Doped MgO Nanoparticles. Application for Magnetic Hyperthermia

2023

View full text Add to dashboard Cite

The influence of size and doping effects on the magnetization M, phonon ω and band gap energy Eg of MgO nanoparticles is studied using a microscopic model. The room-temperature ferromagnetism is due to surface or/and doping effects in MgO nanoparticles (NPs). The influence of the spin–phonon interaction is discussed. M increases with decreasing NP size. M and Eg can increase or decrease by different ion doping (Co, Al, La, Fe) due to the different strain that appears. It changes the lattice parameters and the exchange interaction constants. We found that MgO NP with size of 20 nm and Fe- or Co-doping concentration x = 0.1 and x = 0.2, respectively, have a Curie temperature TC = 315 K, i.e., they are appropriate for application in magnetic hyperthermia, they satisfy the conditions for that. The energy of the phonon mode ω = 448 cm−1 increases with decreasing NP size. It increases with increasing Co and Fe, or decreases with Sr ion doping.

show abstract

Structural and optical characterization of Er-alkali-metals codoped MgO nanoparticles synthesized by solution combustion route

Cited by 10 publications

References 37 publications

Atomistic Simulations of Defect Structures in Rare-Earth-Doped Magnesium Oxide

Atomistic Simulations of Defect Structures in Rare-Earth-Doped Magnesium Oxide

Atomistic Simulations of Defect Structures in Rare Earth Doped Magnesium Oxide

Magnetic, Optical and Phonon Properties of Ion-Doped MgO Nanoparticles. Application for Magnetic Hyperthermia

Contact Info

Product

Resources

About