2003/06/26 by A. A. Bokov, Z.-G. Ye, Z. -G. Ye · 2 citations
Engineering · Materials Science · Physics and Astronomy · #Acoustic Wave Resonator Technologies #Crystal (programming language) #Crystal structure #Diffraction #Ferroelectric and Piezoelectric Materials #Ferroelectricity #Microwave Dielectric Ceramics Synthesis #Monoclinic crystal system #Phase boundary #Polarization (electrochemistry) #Poling #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.1703830
PDF file, 30 pages, 15 figures (3 in color) collected on pp.18-30
arxiv created 2003/06/26 · openalex publication_date 2004/05/17 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The domain structure of (1−x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 single crystals with composition x≈0.33 in the range of the morphotropic phase boundary (MPB) was studied. Based on the analysis of spontaneous strain compatibility and charge of domain walls, we have established the permissible domain arrangements for the ferroelectric phases of different symmetries, which are expected to occur in the range of the MPB. Examination of (001)-oriented unpoled and electrically poled (along the [001] direction) crystal plates in a polarizing microscope reveals a monophase state with the domain structure compatible with the structure theoretically predicted for the MC monoclinic phase (space group Pm), which was recently discovered in the compositions close to the MPB by x-ray and neutron diffraction studies. In the unpoled crystal, the 180° walls between the domains whose spontaneous polarization vectors are parallel to the plane of the crystal plate (i.e., a-domains) are observed. The domain structure of the poled crystal is predominantly composed of crystallographically prominent Wf walls parallel to (001) (i.e., the plane of the crystal plate) and inclined S walls parallel to [110] or [11̄0] direction. In poled and unpoled samples, an optical rotatory polarization effect is found, which is related to the inhomogeneity of the sample resulting from the mixture of domains.