KZnF_3:Eu^(3+)单晶生长及光谱特性

Single Crystal Growth and Spectroscopic Properties of KZnF_3: Eu^(3+)

利用Bridgman－Stockbarger方法在氩气氛下生长出KZnF3：Eu(3+)单晶．测定了晶体的激发光谱、荧光发射光谱和ESR谱，讨论了Eu离子的取代格位．

Single crystal of KZnF3: Eu3+ has been grown by means of Bridgman-Stockbargertechnique in Ar atmosphere. The emission and excitation spectra of europium ion weremeasured. The results show that a small amount of Eu2+ exists in the crystal. The existence ofEu2+ ions was also confirmed by ESR data. The valence change of Eu ions during the crystalgrowth is due to unequivalent substitution of Eu3+ ions for the lattice ions. The sites possiblyoccupied by Eu ions in this crystal were also discussed.