Investigations of the Local Structure and the EPR Parameters for the Tetragonal Ni+ Center in SrF2

Ji-zi Lin, Pei Xiao


The local structure and the spin Hamiltonian parameters g factors g// and g? and the hyperfine structure constants
A// and A? of a tetragonal Ni+ center in SrF2 are investigated, using the high order perturbation formulas for a 3d9
ion in tetragonally elongated octahedra. According to these studies, the impurity Ni+ is found to locate at the
distance of about 0.36 Å from the nearest fluorine plane. The obtained spin Hamiltonian parameters agree well
with the experimental data.

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