Permissible symmetries of multi-domain configurations in perovskite ferroelectric crystals

Abstract

Articles you may be interested in Large electrocaloric effect induced by the multi-domain to mono-domain transition in ferroelectricsPermissible symmetries of multi-domain structures are analyzed in the m3m→3m, m3m→4mm and m3m→mm2 ferroelectric species. Domain structures produced by the application of external electric and/or mechanical fields that allow for the formation of two-dimensional domain superlattice are described in terms of effective group symmetry. Based on our analysis, the most perspective directions for properties enhancement through domain engineering are specified for perovskite ferroelectric crystals having tetragonal, rhombohedral, and orthorhombic symmetries.

Piezoelectric properties of tetragonal single-domain Mn-doped NBT-6 %BT single crystals

“…The different poling field did not yield any significant difference on the final state: all exhibited a piezoelectric constant of about 130 pC/N qualitatively similar domain structures under polarized light. The optical inspection shows the three domain families expected for a 3T domain structure with domain wall orientations that are consistent with tetragonal domains separated by uncharged domain walls as described for instance by Erhart and Cao [22]. In this case, the contrast of Raman spectroscopy for domain structure characterization is much weaker than in the 2T case, since i) the domain structure cannot be considered twodimensional and ii) the laser does not propagate along a high-symmetry direction of the domains.…”

Relaxor-based ferroelectric single crystals: Growth, domain engineering, characterization and applications

“…In the case of PZT piezoelectric ceramics, the symmetry is isotropic before poling and conical (∞ m ) after poling, the independent property tensor components for poled PZT ceramics are the same as those of point group 6 mm , i.e ., there are a total of 10 independent material constants: 5 elastic, 3 piezoelectric, and 2 dielectric constants. PMN-PT and PZN-PT single crystals have different macroscopic symmetries when being poled in different crystallographic directions [297]. The [001] c poling produces macroscopic tetragonal 4 mm symmetry with 11 independent material constants: 6 elastic, 3 piezoelectric, and 2 dielectric constants.…”

Real-Time Direct Observations of Polarization Reversal in a Piezoelectric Crystal:Pb(Mg1/3Nb2/3)Satô1, Hirayama2, Ikuhara3 2011Phys. Rev. Lett.760430View full textAdd to dashboardCite

“…It is also found that orientation of the DWs can be attributed to neither f100g nor f110g (see Supplemental Material [26] for details). Since orientation of non-180 DWs should be either f100g or f110g when the crystal phase is either tetragonal or rhombohedral [29], this result implies that nanoscale domains observed here would be of a monoclinic phase. This is consistent with previous TEM studies reporting the existence of the monoclinic phase within nanoscale domains in PMN-PT [30] and PZT [31] with the MPB.…”