Studies of the g factors and the superhyperfine parameters for Ni3+ in the fluoroperovskites

Abstract

The g factors and the ligand superhyperfine parameters A and B for Ni 3+ in KMgF3, CsCaF3 and RbCaF3 are theoretically studied from the formulas of these parameters for a 3d 7 ion under octahedral environments in the weak field scheme. The unpaired spin densities for the fluorine 2s, 2pσ and 2pπ orbitals are quantitatively determined from the molecular orbital and configuration interaction coefficients based on the cluster approach. The calculated results show good agreement with the experimental data, based on only one adjustable parameter (i.e., the proportionality factor ρ related to the ligand s-and p-orbitals). The superhyperfine parameters for the axial and planar ligands in RbCaF3:Ni 3+ are satisfactorily interpreted from the different impurity-ligand distances due to the elongation of the ligand octahedron during cubic-to-tetragonal phase transition.

Transparent conductive aluminium and fluorine co-doped zinc oxide films via aerosol assisted chemical vapour deposition

“…16 The incorporation of group III elements into the ZnO lattice has also received much attention. 17,18,19,20,21 Aluminium doped ZnO films involve Al 3+ (0.54 Å) occupying a Zn 2+ (0.74 Å) site leading to a reduction in the lattice parameter. Gallium doped ZnO films are known to have better electrical properties as the ionic radius of Ga 3+ is similar to that of Zn 2+ , minimizing deformation.…”

Preparation and characterization of sprayed In2O3:Mo films

“…As a result the electron density saturates at higher doping levels. Hu et al [15] reported similar behaviour for the CVD grown gallium doped ZnO films. The decrease of mobility at higher Mo doping concentrations (>6 at%) might be also due to the prevalence of impurity scattering, which results in the decrease of conductivity of the films.…”

Assisted-Hydrothermal Synthesis and Characterization of Flower-Like ZnO Nanostructures

“…In reaction (1), Zn 2+ ions are combined with OHradicals in the aqueous solution to form a Zn(OH) 2 colloid through the reaction Zn 2+ + 2OH -→ Zn(OH) 2 . Later, in the hydrothermal process, the Zn(OH) 2 is separated into Zn 2+ ions and OHradicals according to reaction (2).…”