Anomalous dielectric behaviour of La(III) substituted lead titanate ceramics

K. Keizer, G.J. Lansink, A.J. Burggraaf

Research output: Contribution to journalArticleAcademic

35 Citations (Scopus)
69 Downloads (Pure)

Abstract

In La(III) substituted PbTiO3 ceramics the behaviour of the reciprocal dielectric constant in the paraelectric phase can be described by the relation [...] with the exponent 1 γ<2 depending on the composition. This γ-value is an intermediate of values for Curie-Weiss behaviour (γ = 1) and of values connected with diffuse phase transitions (γ = 2) and increases with increasing La(III) concentration.An excellent agreement between experimental and calculated permittivity curves in the paraelectric phase can be achieved using an alternative equation consisting of a linear and a quadratic term with coefficients varying systematically with the composition. The last equation can be derived and interpreted by means of a physical model assuming the existence of heterophase fluctuations.
Original languageEnglish
Pages (from-to)59-63
JournalJournal of physics and chemistry of solids
Volume39
Issue number1
DOIs
Publication statusPublished - 1978

Fingerprint Dive into the research topics of 'Anomalous dielectric behaviour of La(III) substituted lead titanate ceramics'. Together they form a unique fingerprint.

  • Cite this