Magnetic moment of the 4f/sup 8/ and 4f/sup 7/5d electronic configurations of Tb/sup 3+/ ions in wide bandgap fluoride dielectric crystals

The concentration of the Tb/sup 3+/ ions in wide bandgap KY/sub 3/F/sub 10/ crystals was measured by the vibrating sample magnetometry method with 0.1% accuracy. The host crystal exhibits a diamagnetic response, while the Tb/sup 3+/ ions have paramagnetic response to external magnetic fields in the 4f/sup 8/ electronic configuration. In addition, vacuum ultraviolet coherent excitation of the 4f/sup 7/5d electronic configuration enhances the magnetic moment of the 4f/sup 7/5d electronic configuration in comparison to the magnetic moment of the 4f/sup 8/ electronic configuration within the lifetime of the 4f/sup 7/5d levels.