Transition between the relaxor and ferroelectric states for (1-x)Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}-xPbTiO{sub 3} with x=0.2 and 0.3 polycrystalline aggregates

Journal Article · Mon Aug 22 00:00:00 EDT 2005 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2010608· OSTI ID:20709718

Alguero, M; Jimenez, B; Pardo, L ^[1]

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1. Instituto de Ciencia de Materiales de Madrid, CSIC. Cantoblanco, 28049 Madrid (Spain)

The transition between the relaxor and ferroelectric states for 0.8Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}-0.2PbTiO{sub 3} and 0.7Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}-0.3PbTiO{sub 3} polycrystalline aggregates has been studied by measurements of the dielectric and elastic properties as a function of temperature. The ferroelectric to relaxor transition seems to present a regime of ferroelectric fluctuations that is sharply interrupted by the appearance of the polar nanodomains. It also presents thermal hysteresis, not only in the transition temperature, T{sub c}, but in the characteristic time scale of the ferroelectric fluctuations that is longer on cooling than on heating. The latter effect is much more significant for 0.8Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}-0.2PbTiO{sub 3} (T{sub c}=346 K on heating), than for 0.7Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}-0.3PbTiO{sub 3} (T{sub c}{approx}408 K on heating). This indicates that there is a sharp slowing down of the kinetics of the phase transition below 346 K.

• OSTI ID: 20709718
• Journal Information: Applied Physics Letters, Vol. 87, Issue 8; Other Information: DOI: 10.1063/1.2010608; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
COOLING
ELASTICITY
FERROELECTRIC MATERIALS
HEATING
HYSTERESIS
LEAD COMPOUNDS
MAGNESIUM COMPOUNDS
NIOBIUM COMPOUNDS
PERMITTIVITY
PHASE TRANSFORMATIONS
POLYCRYSTALS
SLOWING-DOWN
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TITANATES
TRANSITION TEMPERATURE
YOUNG MODULUS