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Powders and waveguiding films of europium-doped hafnium oxide (Eu 3+ :HfO 2 ) are prepared by a sol-gel process. The material is synthesized using hafnium tetra-ethoxide and europium (III) nitrate pentahydrate which are dissolved in ethanol and mixed with acatylacetone. The powders and the films present structural changes depending on Eu 3+ concentration and annealing...
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