Tweed domains in ferroelectrics with compositions at the morphotropic phase boundary

• Published in: Philosophical magazine letters Vol. 84; no. 3; pp. 191 - 197
• Main Authors: Meng, X., Baba-Kishi, K. Z., Pang, G. K. H., Chan, H. L., Choy, C. L., Luo, H. S.
• Format: Journal Article
• Language: English
• Published: London Taylor & Francis Group 01.03.2004; Taylor & Francis
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Dielectric, piezoelectric, ferroelectric and antiferroelectric materials; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Niobates, titanates, tantalates, pzt ceramics, etc; Physics; Solid-solid transitions; Specific phase transitions; Polarization; Inorganic compounds; Domain walls; Transition element compounds; Morphotropic phase boundary; Niobates; Titanates; Twinning; Experimental study; Monocrystals; Transmission electron microscopy; Ferroelectric materials; Domain structure
• ISSN: 0950-0839; 1362-3036
• DOI: 10.1080/09500830310001649849

Observations by transmission electron microscopy reveal the general existence of tweed domains on nanoscopic and mesoscopic scales in unpoled 0.7Pb(Mg 1/3 Nb 2/3 )O 3 -0.3PbTiO 3 , 0.92Pb(Fe 1/2 Nb 1/2 )O 3 -0.08PbTiO 3 and Pb(Fe 1/2 Nb 1/2 )O 3 single crystals. These crystals consist of many tweed regions. Each of these includes only single twinning variant tweeds along either or . Mesoscopic needle domains or wedge boundaries were created when two tweed regions meet. The tweed structure could limit possible polar domain states that determine macropolarization states of materials.