TY - JOUR
T1 - Electron paramagnetic resonance of Ir4+ ions in MgO and CaO
AU - Raizman, A.
AU - Suss, J. T.
PY - 1980
Y1 - 1980
N2 - Electron-paramagnetic-resonance spectra of Ir4+ were studied in single crystals of MgO and CaO. In each host an isotropic cubic spectrum and two anisotropic tetragonal spectra were observed. Models are proposed for the tetragonal centers, one with a host cation vacancy at a next-nearest-neighbor site to an Ir4+ ion in a [100]-type direction, and another including also a cation with a charge greater than 2 at a next-nearest-neighbor site to the vacancy on the defect axis. The tetragonal spectra exhibit quadrupole interaction. The fitting of the spin-Hamiltonian parameters to the EPR spectra was carried out by using a fortran iv version of the MAGNSPEC computer program. The EPR results were used to calculate crystal-field, magnetic, and covalency parameters.
AB - Electron-paramagnetic-resonance spectra of Ir4+ were studied in single crystals of MgO and CaO. In each host an isotropic cubic spectrum and two anisotropic tetragonal spectra were observed. Models are proposed for the tetragonal centers, one with a host cation vacancy at a next-nearest-neighbor site to an Ir4+ ion in a [100]-type direction, and another including also a cation with a charge greater than 2 at a next-nearest-neighbor site to the vacancy on the defect axis. The tetragonal spectra exhibit quadrupole interaction. The fitting of the spin-Hamiltonian parameters to the EPR spectra was carried out by using a fortran iv version of the MAGNSPEC computer program. The EPR results were used to calculate crystal-field, magnetic, and covalency parameters.
UR - https://www.scopus.com/pages/publications/25544445600
U2 - 10.1103/physrevb.22.1141
DO - 10.1103/physrevb.22.1141
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AN - SCOPUS:25544445600
SN - 0163-1829
VL - 22
SP - 1141
EP - 1149
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 3
ER -