The electric field-induced transformation of the melting state of langasite from incongruent into congruent

The electric field required for the transformation of the melting state of langasite from incongruent into congruent was semi-quantitatively and quantitatively evaluated. Both evaluation methods demonstrated that the required electric field was on the order of 104–105 V/cm. This was significantly higher than the external electric field of 600 V/cm, which was experimentally observed. This large difference was attributed to the possibility that nucleation occurred in the electric double layer, which could sustain a very large electric field.