Dielectric Spectroscopy of Relaxors and Dipolar Glasses

Banys, J.; Grigalaitis, R.; Mikonis, Andrejus; Macutkevič, J.; Keburis, P.

doi:10.1080/00150193.2010.482881

Cited by 1 publication

(2 citation statements)

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“…As it was shown more than once, see for example [55], for undoped PLZT 8/65/35 ceramics the shape of ε 0 (T, f) is fully determined by relaxation of the polar nano-regions (PNR) and the appropriate peak temperature of T m, ε is well fitted by the Vogel-Fulcher (VF) law. However, as follows from Fig.…”

Section: Resultsmentioning

confidence: 79%

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Effects of Mn doping on dielectric properties of ferroelectric relaxor PLZT ceramics

Dimza

Попов

Lace

et al. 2017

Current Applied Physics

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A series of PLZT (8/65/35) ceramics with different Mn 2 O 3 concentration (0.01, 0.1, 0.3, 1.0, and 3.0% by weight) have been synthesized to figure out its influence on their dielectric properties. The complex dielectric permittivity ε* ¼ ε 0 Àiε 00 as function of frequency and temperature as well as polarisation loops P(E) have been studied as a function of Mn concentration. It was found that Mn doping is restrained the Vogel-Fulcher law held in the unmodified PLZT compound producing essential change of the dependence of ε* on temperature and frequency and of the shape of P(E). The observed effects are explained by gradual involvement of Debye and Maxwell-Wagner polarisation mechanisms in relaxation processes with the growth of the concentration of Mn concentration admixture. A decrease of the ε'(T) maximum value and shift of the maximum to higher temperatures is observed. The observed effects are attributed to impacts of Mn 2þ and Mn 3þ ions: formation of oxygen vacancies paired with Mn 2þ as dipoles and Jahn-Teller distortion prompted by Mn 3þ ions.

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Section: Resultsmentioning

confidence: 79%

“…Note, that recently it has been shown and quantitatively confirmed that PLZT 8/65/35 ceramics can be considered as model classical relaxor compound [55].…”

Section: Introductionmentioning

confidence: 81%