Polarized laser selective excitation and electron paramagnetic resonance of Er3+ centers in SrLaAlO4 crystals

J.-P.R. Wells, M. Yamaga, R.W. Mosses, T.P.J. Han, H.G. Gallagher, T. Yosida

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Abstract

The crystal growth and optical and magnetic spectroscopies of perovskite phase, strontium lanthanium aluminate (SrLaAlO4) doped with trivalent erbium are reported. Electron paramagnetic resonance of SrLaAlO4:1%Er3+ identifies two distinct Er3+ ion centers in this material: a tetragonal (C4v) symmetry center with spin Hamiltonian parameters of g=2.70.05 and g=8.50.05 and a minor center of orthorhombic symmetry having gx=9.40.05, gy=6.80.05, and gz=2.30.05. From a combination of optical absorption and polarized laser selective excitation, a total of 40 energy levels and their irreducible representation symmetry labels have been determined for the C4v symmetry center, while 22 energy levels have been determined for a minor center. A C4v symmetry, crystal-field parametrization for the dominant center yields optimized parameters consistent with proposed structural models. The g tensors of the ground-state Kramers doublets, calculated from the C4v center wave functions, are in good agreement with the measured g values.
Original languageEnglish
Pages (from-to)3905-3914
Number of pages10
JournalPhysical Review B (Condensed Matter)
Volume61
Issue number6
DOIs
Publication statusPublished - 1 Feb 2000

Keywords

  • crystal field interactions
  • crystal growth from melt
  • erbium
  • impurity absorption spectra
  • impurity states
  • paramagnetic resonance
  • strontium compounds
  • wave functions

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