Dielectric-State Analysis in Solid-Solution Pb(Yb1/2Ta1/2)O3-Pb(Lu1/2Nb1/2)O3

• Published in: Journal of the American Ceramic Society Vol. 83; no. 1; pp. 135 - 140
• Main Authors: Park, Yung, Cho, Kurn
• Format: Journal Article
• Language: English
• Published: Westerville, Ohio American Ceramics Society 01.01.2000; Blackwell; Wiley Subscription Services, Inc
• Subjects: Ceramics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; dielectric materials/properties; Dielectric properties of solids and liquids; Dielectric, piezoelectric, ferroelectric and antiferroelectric materials; Dielectrics; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Diffraction; Diffusion; Exact sciences and technology; Ferroelectricity and antiferroelectricity; lead; Niobates, titanates, tantalates, pzt ceramics, etc; perovskites; Phase transformations; Phase transitions and curie point; Physics; Reflection; Temperature dependence; X-rays; Inorganic compounds; Phase transformations; Transition element compounds; Tantalum oxides; Lead oxides; Perovskites; Rare earth compounds; Experimental study; Lutetium oxides; Ytterbium oxides; Solid solutions; Dielectric losses; Niobium oxides; Permittivity; Spontaneous polarization
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1151-2916.2000.tb01161.x

The structure and temperature dependence of complex lead perovskite dielectrics were investigated for the system (1 −x)Pb(Yb1/2Ta1/2)O3–x Pb(Lu1/2Nb1/2)O3. Superlattice reflections for the compositions 0.8 < x < 1.0 were observed by X‐ray diffractometry, and the temperature‐composition dielectric‐state diagram was determined. In the present study, the disordered middle composition, with 0.2 < x < 0.8, showed a diffuse paraelectric–ferroelectric phase transition, whereas the ordered end compositions, with 0 ≤x < 0.2 and 0.8 < x≤ 1.0, revealed successive sharp paraelectric–antiferroelectric and weak antiferroelectric–ferroelectric phase transitions. The dielectric state was confirmed by examining the variation of polarization (P) with electric field (E).