2010/10/12 by Manuel Hinterstein, Michael Knapp, Markus Hölzel +4 · 187 citations
Chemistry · Engineering · Materials Science · #Chemistry #Composite material #Condensed matter physics #Crystal structure #Crystallite #Crystallography #Electric field #Ferroelectric and Piezoelectric Materials #Materials science #Microwave Dielectric Ceramics Synthesis #Multiferroics and related materials #Neutron diffraction #Phase (matter) #Phase transition #Physics #Piezoelectricity #Rietveld refinement #Tetragonal crystal system
paper · pdf · doi:10.1107/s0021889810038264
published in Journal of Applied Crystallography 43(6), 1314-1321 (Wiley)
openalex publication_date 2010/10/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/25
The origin of the electric field-induced strain in the polycrystalline ceramic 0.92Bi 1/2 Na 1/2 TiO 3 –0.06BaTiO 3 –0.02K 1/2 Na 1/2 NbO 3 was investigated using in situ high-resolution X-ray and neutron diffraction techniques. The initially existing tetragonal phase with pseudocubic lattice undergoes a reversible phase transition to a significantly distorted rhombohedral phase under electric field, accompanied by a change in the oxygen octahedral tilting from a 0 a 0 c + to a − a − a − and in the tilting angle. The polarization values for the tetragonal and rhombohedral phases were calculated based on the structural information from Rietveld refinements. The large recoverable electric field-induced strain is a consequence of a reversible electric field-induced phase transition from an almost nonpolar tetragonal phase to a ferroelectrically active rhombohedral phase.