Tracking ferroelectric domain formation during epitaxial growth of PbTiO3 films

Martin F. Sarott, Manfred Fiebig & Morgan Trassin
The arrangement of domains and domain walls is a crucial factor in determining the functional properties of ferroelectric materials. Here, we track the ferroelectric domain formation mechanism in ultrathin PbTiO3 films in real time during epitaxial growth using in-situ optical second harmonic generation (ISHG). In combination with complementary exsitu piezoresponse force microscopy and SHG imaging, we unambiguously identify the tensile-epitaxial-strain-induced partial conversion of out-of-plane-polarized c-domains into in-plane-polarized a-domains. We further show that in the strongly...
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