Study on diffuse antiferroelectric-paraelectric phase transition in pseudobinary Pb(Fe/sub 1/2/Nb/sub 1/2/)O/sub 3/-xPb(Mg/sub 1/2/W/sub 1/2/)O/sub 3/ solid solution

Journal Article · Mon Nov 01 04:00:00 EST 1982 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.330102· OSTI ID:7085872

Choo, W K; Lee, M H

An antiferroelectric-paraelectric diffuse phase transition in pseudobinary (1-x)Pb(Fe/sub 1/2/Nb/sub 1/2/)O/sub 3/-xPb(Mg/sub 1/2/W/sub 1/2/)O/sub 3/ solid solution for 0.60< or =x< or =1.00 is investigated by its dielectric property and calorimetric measurements. The dielectric constant shows a diffuse phase transition behavior for 0.60 < or =x< or =0.88, but shows a sharp phase transition behavior for 0.90< or =x< or =1.00. The apparent dielectric transition temperature increases with increasing external frequency for 0.60< or =x< or =0.88, but remains constant with respect to the change in external frequency for 0.90< or =x< or =1.00. Dielectric curves as a function of temperature show broadened peaks for 0.60< or =x< or =0.88, but show relatively sharp peaks for 0.90< or =x< or =1.00. The transition enthalpy change also increases with increasing x. The diffuse phase transition for 0.60< or =x< or =0.88 is accompanied by a small enthalpy change. The small enthalpy difference between the antiferroelectric and paraelectric phases seems to lower the barrier between the two phases, and in the process, the diffuse phase transition seems to be induced.

• Research Organization: Department of Materials Science, Korea Advanced Institute of Science and Technology, P. O. Box 150, Chongryang, Seoul, Korea
• OSTI ID: 7085872
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 53:11; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALLOY SYSTEMS
ANTIFERROELECTRIC MATERIALS
BINARY ALLOY SYSTEMS
CALORIMETRY
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
DISPERSIONS
ELECTRICAL PROPERTIES
ENTHALPY
FREQUENCY DEPENDENCE
LEAD COMPOUNDS
LEAD TUNGSTATES
MANGANATES
MANGANESE COMPOUNDS
MATERIALS
MIXTURES
NIOBATES
NIOBIUM COMPOUNDS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SOLID SOLUTIONS
SOLUTIONS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TUNGSTATES