Effect of Jahn-Teller distortions on the structural and magnetic ordering in perovskite-type transition-metal oxides

Bogdanova, Kh. G.; Bulatov, A. R.; Golenishchev-Kutuzov, V. A.; Kalimullin, R. I.; Potapov, A. A.

doi:10.3103/s1062873808080406

Cited by 2 publications

(2 citation statements)

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“…An essential aspect here to take into account is the Jahn-Teller effect related to Mn 3þ ions (d4 configuration) manifested either as the dynamic, cooperative JTE or as field-induced effect linked to dipoles of Jahn-Teller ions [33,34]. These dipoles may be of two kinds: Mn 3þ -V O and Mn 3þ ions pushed off the centre of the oxygen octahedron.…”

Section: Depth Of Dispersion (Dd) Formentioning

confidence: 99%

“…In the case PLZT relaxor ceramics, the appropriate number of the studies, concerning their doping with d-compounds, is still very limited [47e50]. Special attention in these studies has been paid to the effects caused by admixtures, when the material properties are improved and/or deliberately modified as well as due to the interest in fundamental problems such as emergence of Jahn-Teller (JT) effect (JTE) [27,33,34,44].…”

Section: Introductionmentioning

confidence: 99%

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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: Depth Of Dispersion (Dd) Formentioning

confidence: 99%