[12a-A201-1~8] 15.1 Bulk crystal growth

▲ [12a-A201-6] Unsteady-state crystal growth in the presence of interface electric field

〇(D)Qilin Shi¹, Jun Nozawa¹, Satoshi Uda¹ (1.Tohoku Univ.)

Keywords:true congruent LiNbO3, interface electric field, unsteady-state crystal growth

Doping a certain amount of MgO to the LN enables it to be stoichiometric and congruent simultaneously (denoted as cs-MgO:LN, Li₂O:Nb₂O₅:MgO=45.3:50.0:4.7mol%). According to our thermodynamic analysis on partitioning of ionic species, it is expected that no segregation of any ionic species takes place during steady-state growth of the cs-MgO:LN. Since the equilibrium partitioning coefficient, k₀, is unity for all constituent species including ionic species. Based on the understanding of partitioning of ionic species in cs-MgO:LN, we expect that for the unsteady-state growth, Mg concentration changes in the presence of interface electric field while there is no segregation with zero interface electric field.