Effect of pressure on cubic (C-type) Eu2O3studied via Eu3+luminescence
- 1 December 1991
- journal article
- research article
- Published by Taylor & Francis in High Pressure Research
- Vol. 6 (6) , 371-377
- https://doi.org/10.1080/08957959208201045
Abstract
Luminescence spectra from Eu3+ ion in C-type Eu2O3 under high pressures have been obtained. The spectral shifts can be used to study the effect of pressure on the spin-orbit and the Coulomb interactions of the 4f electrons, which are correlated with expansion of the 4f-electron wave functions. This expansion with the application of pressure results in both the variation of the electronegativity and radius of the Eu3+ ion and, ultimately, the phase transformation from C-to B-type Eu2O3. Therefore, core 4f-electrons can thus be thought of as quasivalence electrons.Keywords
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