| Abstract
| - After the determination of the crystallization region of KNd(PO3)4 (KNP) in the ternary system Nd2O3−K2O−P2O5, we obtained high-quality crystals of this stoichiometric neodymium material which is useful for mini laser devices development. The second-harmonic generation measurements reveals that KNP is a good nonlinear optical material.
- We determined the crystallization region of KNd(PO3)4 (KNP), the isotherms of saturationtemperature, and three neighboring phases of this crystallization region, NdPO4, Nd(PO3)3,and NdP5O14, in the Nd2O3−K2O−P2O5 system. We successfully grew KNP single crystalsby the top seeded solution growth slow cooling method (TSSG). To optimize the growth processsolution composition, seed orientation and rotation velocity were analyzed. We studied theevolution with the temperature of the KNP cell parameters in the room temperature to 773K range, and the linear thermal expansion tensor of KNP was studied. We also studied thephase transitions of KNP in the room temperature to 1273 K range and found an irreversibledecomposition at 1165 K. The second harmonic efficiency measured was at least similar tothat of KH2PO4 (KDP).
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