Peter J. Price
Surface Science
The microscopic structure of the Fe3+-VO and Mn2+-VO pair centers has been considered using the Newman superposition model. This model yields the EPR parameter b20 as a function of transition-metal-ion-oxygen distance d and position. It is found, for the oxide perovskites, that the transition-metal ion moves by a distance Δ=0.1 d=0.2 our lateral oxygens move against the metal ion by 4% or 0.08. This is in agreement with the reduction of the metal ionic radius due to the five-fold coordination. The intrinsic two-center parameter b̄2 needed in the Newman model is based on the uniaxial strain data of MgO and SrTiO3, as well as on the measured spin-Hamiltonian parameter b20 in the tetragonal phase of SrTiO3. The b̄2 parameters obtained also provide information on other centers reported in oxide and fluoride compounds. © 1979 The American Physical Society.
Peter J. Price
Surface Science
J.A. Barker, D. Henderson, et al.
Molecular Physics
Ranulfo Allen, John Baglin, et al.
J. Photopolym. Sci. Tech.
William G. Van der Sluys, Alfred P. Sattelberger, et al.
Polyhedron