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Applied Physics Letters / Volume 97 / Issue 6 / DIELECTRICS AND FERROELECTRICITY

Appl. Phys. Lett. 97, 062906 (2010); http://dx.doi.org/10.1063/1.3479479 (3 pages)

A morphotropic phase boundary system based on polarization rotation and polarization extension

Dragan Damjanovic

Ceramics Laboratory, Swiss Federal Institute of Technology in Lausanne–EPFL, 1015 Lausanne, Switzerland

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(Received 22 June 2010; accepted 24 July 2010; published online 10 August 2010)

Many ferroelectric solid solutions exhibit enhanced electromechanical properties at the morphotropic boundary separating two phases with different orientations of polarization. The mechanism of properties enhancement is associated with easy paths for polarization rotation in anisotropically flattened free energy profile. Another mechanism of properties enhancement related to free energy flattening is polarization extension. It is best known at temperature-driven ferroelectric-paraelectric phase transitions and may lead to exceedingly large properties. Its disadvantage is temperature instability of the enhancement. In this paper a temperature-composition phase diagram is proposed that exhibits compositionally driven-phase transitions with easy paths for both polarization rotation and polarization extension.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

dielectric polarisation, ferroelectric transitions, phase diagrams

PACS

  • 81.30.Dz

    Phase diagrams of other materials

  • 77.22.Ej

    Polarization and depolarization

  • 77.80.B-

    Phase transitions and Curie point

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3479479

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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