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Applied Physics Letters / Volume 81 / Issue 5 / DIELECTRICS AND FERROELECTRICITY

Appl. Phys. Lett. 81, 886 (2002); http://dx.doi.org/10.1063/1.1497199 (3 pages)

From incipient ferroelectricity in CaTiO3 to real ferroelectricity in Ca1−xPbxTiO3 solid solutions

V. V. Lemanov1, A. V. Sotnikov2,1, E. P. Smirnova1, and M. Weihnacht2

1A. F. Ioffe Physical-Technical Institute, 194021 St. Petersburg, Russia
2Leibniz Institute for Solid State and Materials Research Dresden, D-01069 Dresden, Germany

(Received 15 April 2002; accepted 3 June 2002)

Dielectric spectra of ceramic samples of Ca1−xPbxTiO3 (0 ⩽ x ⩽ 0.4) solid solutions were studied at frequencies between 10 Hz and 1 MHz in a temperature range of 4.2–300 K. A ferroelectric phase transition was observed at x = 0.3 with transformation to a relaxor type behavior at x>0.3. The transition temperature Tc follows a linear dependence Tc∝(x−xc) with xc = 0.28 contrary to a square-root dependence Tc∝(x−xc)1/2 predicted by the theory for incipient ferroelectrics. The critical concentration essentially exceeds the xc values for SrTiO3 and KTaO3 incipient ferroelectrics. © 2002 American Institute of Physics.

© 2002 American Institute of Physics

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KEYWORDS and PACS

Keywords

calcium compounds, lead compounds, ferroelectric ceramics, solid solutions, ferroelectric transitions, dielectric relaxation, ferroelectric Curie temperature, permittivity, microwave materials

PACS

  • 77.84.Ek

    Niobates and tantalates

  • 77.84.Cg

    PZT ceramics and other titanates

  • 77.80.B-

    Phase transitions and Curie point

  • 77.22.Gm

    Dielectric loss and relaxation

  • 77.22.Ch

    Permittivity (dielectric function)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.1497199

PUBLICATION DATA

ISSN

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

Publisher

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

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