Journal
APPLIED PHYSICS LETTERS
Volume 91, Issue 15, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2790481
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This letter presents direct electron diffraction evidence that structurally frustrated one-dimensional polar nanoregions arising from anticorrelated displacements of Ti and nearest neighboring O ions are responsible for the relaxation behavior observed in doped BaTiO3 relaxor ferroelectrics, rather than chemical short range ordering. The role of the dopant ions is not to directly induce polar nanoregions but rather to set up random local strain fields preventing homogeneous strain distortion, thereby suppressing transverse correlation from one < 001 > chain dipole to the next and hence the development of long range ferroelectric order. (C) 2007 American Institute of Physics.
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