The Bur method was used to grow PbTiO3 single crystals in the present
experiment, and the domain structures of polydomain as-grown crystals
have been studied using optical and electron microscopy. Investigation
s on etched crystals indicate that crystals grown under different cond
itions have similar domain structural characteristics, but those grown
under conditions with heavy PbO evaporation show relatively complicat
ed 90 degrees domain arrangements. Various domain structures have been
observed, including conventional 90 degrees domain arrangements, herr
ingbone structures, banded structures, and intersecting banded structu
res. In addition, domain bands that may correspond to transformation v
ariants in alloys were also seen. Drawing schematic polarization confi
gurations, one finds that head-to-head, tail-to-tail, or other unconve
ntional domain configurations exist constantly in PbTiO3 crystals, ind
icating that the high energy configurations are quite common in lead t
itanate crystals.