DISTRIBUTION OF INTERNAL BIAS FIELD IN L-ALPHA-ALANINE-DOPED TRIGLYCINE SULFATE CRYSTAL

Distribution of internal bias field E(b) was investigated in an LATGS crystal grown from TGS solution containing 10 mol% L-alpha-alanine. As the crystal was of single domain, the field E(b) was oriented in one definite direction all over the crystal. The intensity of E(b) distributed over a wide range of 30 to 500 kV/m or more, and distinctly depended on the crystal growth sector. The distribution showed the polar symmetry 2, similarly to the crystal form of LATGS. Generally speaking, E(b) in the - b side of the seed crystal was more intense than in the + b side. The spontaneous polarization and the coercive field did not show a significant distribution in the crystal.