Diffuse Phase Transition and Dielectric Tunability of Ba0.97La0.02TiO3 Relaxor Ferroelectric Ceramic

Marwa Jebli; M. A. Albedah; J. Dhahri; M. Ben Henda; Mohamed Lamjed Bouazizi; Hafedh Belmabrouk

doi:10.1007/s10904-021-02189-6

Diffuse Phase Transition and Dielectric Tunability of Ba_0.97La_0.02TiO₃ Relaxor Ferroelectric Ceramic

Marwa Jebli
, M. A. Albedah
, J. Dhahri
, M. Ben Henda
, Mohamed Lamjed Bouazizi
, Hafedh Belmabrouk

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Lead-free La_0.02Ba_0.97TiO₃ (2LBT) ceramic was elaborated via the molten-salt method characterized by XRD and Raman spectroscopy. Further their electric, dielectric, and ferroelectric properties were investigated. XRD results demonstrate that the sample possessed a pure-tetragonal structure with a space group of P4/mmm. The notable effect of incorporating the La³⁺ cation into an A-site sublattice was clarified using Raman spectroscopy. Significant improvements have been demonstrated in dielectric properties. The observed relaxation is attributed to Maxwell–Wagner polarization. 2LBT sample demonstrated a 3 phase transition with negligible frequency dispersion indicating diffuse phase transition at the specific temperature range (292–700 K). Upper than 700 K, 2LBT sample provided a pointy transition. The electrical properties obtained from the complex electric modulus reveal a conduction process owing to the short-range mobility of charge carrier. Both ac and dc electrical conductivities are considered vs. frequency and temperature.

Original language	English
Pages (from-to)	1334-1353
Number of pages	20
Journal	Journal of Inorganic and Organometallic Polymers and Materials
Volume	32
Issue number	4
DOIs	https://doi.org/10.1007/s10904-021-02189-6
State	Published - Apr 2022

Keywords

Ac/dc conductivity
Dielectric response
Electrical modulus
Raman analysis
Relaxor character
Thermodynamic parameters

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10.1007/s10904-021-02189-6

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title = "Diffuse Phase Transition and Dielectric Tunability of Ba0.97La0.02TiO3 Relaxor Ferroelectric Ceramic",

abstract = "Lead-free La0.02Ba0.97TiO3 (2LBT) ceramic was elaborated via the molten-salt method characterized by XRD and Raman spectroscopy. Further their electric, dielectric, and ferroelectric properties were investigated. XRD results demonstrate that the sample possessed a pure-tetragonal structure with a space group of P4/mmm. The notable effect of incorporating the La3+ cation into an A-site sublattice was clarified using Raman spectroscopy. Significant improvements have been demonstrated in dielectric properties. The observed relaxation is attributed to Maxwell–Wagner polarization. 2LBT sample demonstrated a 3 phase transition with negligible frequency dispersion indicating diffuse phase transition at the specific temperature range (292–700 K). Upper than 700 K, 2LBT sample provided a pointy transition. The electrical properties obtained from the complex electric modulus reveal a conduction process owing to the short-range mobility of charge carrier. Both ac and dc electrical conductivities are considered vs. frequency and temperature.",

keywords = "Ac/dc conductivity, Dielectric response, Electrical modulus, Raman analysis, Relaxor character, Thermodynamic parameters",

author = "Marwa Jebli and Albedah, \{M. A.\} and J. Dhahri and \{Ben Henda\}, M. and Bouazizi, \{Mohamed Lamjed\} and Hafedh Belmabrouk",

note = "Publisher Copyright: {\textcopyright} 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.",

year = "2022",

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doi = "10.1007/s10904-021-02189-6",

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T1 - Diffuse Phase Transition and Dielectric Tunability of Ba0.97La0.02TiO3 Relaxor Ferroelectric Ceramic

AU - Jebli, Marwa

AU - Albedah, M. A.

AU - Dhahri, J.

AU - Ben Henda, M.

AU - Bouazizi, Mohamed Lamjed

AU - Belmabrouk, Hafedh

PY - 2022/4

Y1 - 2022/4

N2 - Lead-free La0.02Ba0.97TiO3 (2LBT) ceramic was elaborated via the molten-salt method characterized by XRD and Raman spectroscopy. Further their electric, dielectric, and ferroelectric properties were investigated. XRD results demonstrate that the sample possessed a pure-tetragonal structure with a space group of P4/mmm. The notable effect of incorporating the La3+ cation into an A-site sublattice was clarified using Raman spectroscopy. Significant improvements have been demonstrated in dielectric properties. The observed relaxation is attributed to Maxwell–Wagner polarization. 2LBT sample demonstrated a 3 phase transition with negligible frequency dispersion indicating diffuse phase transition at the specific temperature range (292–700 K). Upper than 700 K, 2LBT sample provided a pointy transition. The electrical properties obtained from the complex electric modulus reveal a conduction process owing to the short-range mobility of charge carrier. Both ac and dc electrical conductivities are considered vs. frequency and temperature.

AB - Lead-free La0.02Ba0.97TiO3 (2LBT) ceramic was elaborated via the molten-salt method characterized by XRD and Raman spectroscopy. Further their electric, dielectric, and ferroelectric properties were investigated. XRD results demonstrate that the sample possessed a pure-tetragonal structure with a space group of P4/mmm. The notable effect of incorporating the La3+ cation into an A-site sublattice was clarified using Raman spectroscopy. Significant improvements have been demonstrated in dielectric properties. The observed relaxation is attributed to Maxwell–Wagner polarization. 2LBT sample demonstrated a 3 phase transition with negligible frequency dispersion indicating diffuse phase transition at the specific temperature range (292–700 K). Upper than 700 K, 2LBT sample provided a pointy transition. The electrical properties obtained from the complex electric modulus reveal a conduction process owing to the short-range mobility of charge carrier. Both ac and dc electrical conductivities are considered vs. frequency and temperature.

KW - Ac/dc conductivity

KW - Dielectric response

KW - Electrical modulus

KW - Raman analysis

KW - Relaxor character

KW - Thermodynamic parameters

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U2 - 10.1007/s10904-021-02189-6

DO - 10.1007/s10904-021-02189-6

M3 - Article

AN - SCOPUS:85123108996

SN - 1574-1443

VL - 32

SP - 1334

EP - 1353

JO - Journal of Inorganic and Organometallic Polymers and Materials

JF - Journal of Inorganic and Organometallic Polymers and Materials

IS - 4

ER -

Diffuse Phase Transition and Dielectric Tunability of Ba_0.97La_0.02TiO₃ Relaxor Ferroelectric Ceramic

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Keywords

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