Lattice rotation vortex at the monoclinic ferroelectric domain boundary   in relaxor ferroelectric crystal
  We present the evidence of lattice rotation vortices having an average radius of ~7 nm at the monoclinic ferroelectric domain boundary of (1-x)Pb(Zn1/3Nb2/3)O3-xPbTiO3 (PZN-xPT, x=0.08). Maps of crystal orientations, domain configurations, symmetry breaking are obtained using scanning convergent beam electron diffraction (SCBED). Such measurements suggest the merging of 2D and 1D topological defects, with implications for domain-switching mechanisms in relaxor ferroelectric crystals, and the possibility of a new form of nanoscale ferroelectric devices. 
Yu-Tsun Shao and Jian-Min Zuo
cond-mat.mes-hall cond-mat.mtrl-sci