Investigations of the EPR Parameters and Local Structures for Two Tetragonal Cr3+ Centers in NH4

Thus, high-order perturbation formulas of EPR parameters used in the above systems should be based on the cluster approach [15], where the contribu- tions to EPR parameters from

From the calculations it is found that, to explain reasonably the EPR parameters, the local structure (in particular the local trigonal distortion angle θ ) in the vicinity of the Cr

From the calculations it is found that, to explain reasonably the EPR parameters, the local structure (in particular the local trigonal distortion angle θ ) in the vicinity of the Cr

The EPR parameters (zero-field splitting D and g factors g and g ⊥ ) and the local structure for the tetragonal Fe + center in KTaO 3 are theoretically studied by using

It is found that the oxygen octahedron sur- rounding the impurity ion V 4 + changes from elongation along the tetragonal axis in the pure crystal to compression and the magnitude

Noteworthy, for the 3d 1 ions Ti 3+ and Cr 5+ in the tetragonal phase of SrTiO 3 [28, 29], since ¯ R > R ⊥ , the ground state is an orbital doublet, an additional distortion due

b International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016,

The crystal-field parameters for the tetragonally distorted tetrahedra are determined by using the superposition model and the structural data of the impurity Er 3 + on the host Ca 2