| Autor: |
Wells, J.P. R., Yamaga, M., Mosses, R.W., Han, T.P. J., Gallagher, H.G., Yosida, T. |
| Jazyk: |
angličtina |
| Rok vydání: |
2000 |
| Zdroj: |
Physical Review B, 61, 3905-3914 |
| DOI: |
10.1103/physrevb.61.3905 |
| Popis: |
The crystal growth and optical and magnetic spectroscopies of perovskite phase, strontium lanthanium aluminate (SrLaAlO4) doped with trivalent erbium ape reported. Electron paramagnetic resonance of SrLaAlO4:1% Er3+ identifies two distinct Er3+ ion centers in this material: a tetragonal (C-4v) symmetry center with spin Hamiltonian parameters of g parallel to = 2.7 +/- 0.05 and g perpendicular to = 8.5 +/- 0.05 and a minor center of orthorhombic symmetry having g(x) = 9.4 +/- 0.05, g(y) = 6.8 +/- 0.05, and g(z) = 2.3 +/- 0.05. 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 C-4u symmetry center, while 22 energy levels have been determined for a minor center. A C-4v 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 C-4v center wave functions, are in good agreement with the measured g values. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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