Electron Spin Resonance from a Vacancy-Pair Center in Magnesium Oxide
摘要：
We report both experimental and theoretical investigations of a vacancy-pair center, the Fcenter, in the alkaline-earth oxides. For MgO, CaO, and SrO the g tensor of the ESR spectrum is axially symmetric about a crystal axis. Measurements in MgO confirm that the most important hyperfine interaction occurs with the single nearest-neighbor Mg nuclide, I, situated along the tetragonal axis of the defect. For this interaction we determine experimentally that A=17.5G and B=0.7G. The interaction with four equivalent nearest-neighbor Mg nuclides, I, situated perpendicular to the defect axis is much weaker. Our calculations, which assume a simple dielectric continuum model in which an electron is bound to the finite field of an electric dipole, yield binding energies and hyperfine coupling constants which are in good agreement with experimental results for MgO.
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DOI：
10.1103/PhysRev.181.1237
被引量：
年份：
1969
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