Optical absorption properties of ZnF2-RO-TeO2 (R = Pb, Cd and Zn) glasses doped with chromium (III): Neuhauser model and crystal field study

Experimental and modeling study of ZnO:Ni nanoparticles for near-infrared light emitting diodes

“…The analytical eigenvalues of H Trees are function of the Trees parameter α . 15–18,22 For tetrahedral symmetry T d and following the Wybourne's notation, the crystal field Hamiltonian H CF is given by: 15–18,22–28 …”

“…D q is the crystal field strength parameter. H CF is a function of the Racah tensor operators C q ( k ) , with: 15–18,22–28 …”

“…Using the Racah tensor algebraic methods and as we know that HCF is of the intermediate strength, 28 we have calculated numerically the matrix elements of C q ( k ) in the basis functions 15–18,22–28 …”

“…The energies of the stark levels (without and with the spin-orbit interaction) are obtained only by numerical calculation when using the Racah method. In order to study the energy levels splitting of Ni 2+ , we diagonalize the 45 Â 45 matrix associated to the following Hamiltonian: [15][16][17][22][23][24][25][26][27]…”

Impact of Ag2O on the mechanical and shielding features of ZnO- Er2O3-TeO2 glasses

“…TeO 2 glasses, one of the most common glasses, hold technological and scienti c importance because of their distinctive features which include good chemical durability, high refractive indices, interesting optical properties, good semiconducting properties and high dielectric constant. Also, it is reported that TeO 2 glasses have relatively high density and thus possess a good attenuation ability against gamma radiation [20][21][22]. During the preparation process of the TeO 2 -based glasses, some glasses modi ers such as ZnO and Ag 2 O are used to enhance their optical features and radiation attenuation competences [23,24].…”