Dynamical interactions in EuAsO4(Gd) and EuVO4(Gd)
Abstract
Electron-paramagnetic-resonance experiments on Gd3+ impurities in the singlet-ground-state zircon systems EuAsO4 and EuVO4 have been used to study the various possible dynamical interactions in these systems. The low-lying degenerate excited states of Eu3+ in these compounds can produce dynamical electric, magnetic, and exchange fields in the lattice. From the ratios of the linewidths in the fine-structure spectra of EuAsO4(Gd) and EuVO4(Gd), we find that the dynamical magnetic and/or exchange fields are dominant over the dynamical electric fields caused by the Jahn-Teller effect. From the relative magnitudes of the linewidths in the two compounds, we conclude that exchange interactions are more important than the magnetic dipolar effects.
- Publication:
-
Physical Review B
- Pub Date:
- September 1979
- DOI:
- 10.1103/PhysRevB.20.1817
- Bibcode:
- 1979PhRvB..20.1817M