Electron paramagnetic resonance investigation of Dy3+ ions in Bi4Ge3O12 single crystals

摘要

An X-band electron paramagnetic resonance study at 5 K of Dy3+ ions in Bi4Ge3O12 single crystals is reported. The spectra have been attributed to a unique centre of Dy3+ located at the Bi3+ site. The spin-Hamiltonian parameters have been determined for the even isotopes of Dy, as well as for the isotopes Dy-161 and Dy-163. Moreover, a detailed g-factor analysis has been carried out by obtaining the ground doubler wavefunction. To this purpose, we have employed an interpolated set of crystal-field B-n(m) parameters for Dy3+ which was estimated from the fined B-n(m) sets of Nd3+ and Er3+ in Bi4Ge3O12 It is found that the interpolated set yields a satisfactory approach to th-experimental g-factor values, which makes it feasible to predict the energy-level scheme for the ground manifold H-6(15/2) of Dy3+ in this host. [References: 22]