LAUSR

Abstract PSN-PMN-PT, Er 3+ -, and Er 3+ /Yb 3+ -modified PSN-PMN-PT crystals were grown by using the flux method. The effects of Er 3+ and Er 3+ /Yb 3+ modification on the crystal structure, electric, and optical properties were investigated. Phase structure of all the crystals was determined as a pure perovskite structure by the XRD. The dielectric properties of the PSN-PMN-PT crystals along [100]-orientation were enhanced significantly, and the P r increased from 24.2 to 30.99 and 28.5 μC/cm 2 , respectively by the Er 3+ and Er 3+ /Yb 3+ modification. The specific absorption at the UV-VIS-NIR band and the strong green and red UC PL at 980 nm laser excitation were observed in the Er 3+ - and Er 3+ /Yb 3+ -modified PSN-PMN-PT crystals. The UC emission mechanisms of these modified PSN-PMN-PT crystals were also discussed.