Metastable ferroelectric phase and crossover in the Ba2NdFeNb4-xTaxO15 TTB solid solution

Albino M.; Heijboer P.; Porcher F.; Decourt R.; Veber P.; Maglione M.; Josse M.

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Metastable ferroelectric phase and crossover in the Ba2NdFeNb4-xTaxO15 TTB solid solution

机译：Ba2NDFENB4-XTAXO15 TTB固溶体的亚稳态铁电相和交叉

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In the framework of the crystal chemical investigation of Tetragonal Tungsten Bronze (TTB) niobates, the Ba2NdFeNb4-xTaxO15 solid solution has been investigated in order to gain insights on the relaxor to ferroelectric crossover and its features. Single-phase ceramics were synthesised by conventional two-step firing and sintering and they underwent extended chemical, structural, microstructural and physical characterizations. For Nb-rich compositions (x = 0.5), the temperature dependence of the dielectric permittivity, the pyroelectric coefficient, and also the ferroelectric hysteresis loops revealed a nonconventional relaxor to ferroelectric crossover, which was confirmed by piezoelectric measurements for x = 0.1. A thermal hysteresis of the ferroelectric transition revealed the existence of a metastable ferroelectric phase in these TTB niobates. An accurate and reliable dielectric phase diagram is established from these observations, which allows discussing the original sequence of dielectric phase transitions encountered in this solid solution.

机译：在四方钨青铜（TTB）铌酸盐晶体化学研究的框架中，已经研究了Ba2NDFeNB4-XTaxO15固溶体，以便在储存器对铁电交叉的洞察力及其特征中获得洞察力。通过常规的两步烧制和烧结合成单相陶瓷，并进行延长的化学，结构，微观结构和物理特性。对于富含Nb的组合物（X＆ = 0.5），介电介电常数的温度依赖性，热电系数和铁电磁滞回路揭示了铁电交叉的非共同诱导的松弛剂，其通过压电测量来证实X＆LT; = 0.1。铁电转变的热滞后显示出这些TTB铌酸盐中的亚稳态铁相的存在。从这些观察结果建立了精确可靠的介电相图，这允许讨论在该固溶体中遇到的介电相转变的原始序列。

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《Journal of Materials Chemistry, C. materials for optical and electronic devices》 |2018年第6期|共14页
作者
Albino M.; Heijboer P.; Porcher F.; Decourt R.; Veber P.; Maglione M.; Josse M.;
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CNRS ICMCB UPR 9048 F-33600 Pessac France;

CNRS ICMCB UPR 9048 F-33600 Pessac France;

CEA Saclay Lab Leon Brillouin F-91191 Gif Sur Yvette France;

CNRS ICMCB UPR 9048 F-33600 Pessac France;

CNRS ICMCB UPR 9048 F-33600 Pessac France;

CNRS ICMCB UPR 9048 F-33600 Pessac France;

CNRS ICMCB UPR 9048 F-33600 Pessac France;

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正文语种 eng
中图分类物理化学（理论化学）、化学物理学;
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1. Metastable ferroelectric phase and crossover in the Ba2NdFeNb4-xTaxO15 TTB solid solution [J] . Albino M., Heijboer P., Porcher F., Journal of Materials Chemistry, C. materials for optical and electronic devices . 2018,第6期

机译：Ba2NDFENB4-XTAXO15 TTB固溶体的亚稳态铁电相和交叉
2. Ferroelectric solid solutions with morphotropic boundary: Rotational instability of polarization, metastable coexistence of phases and nanodomain adaptive states [J] . A.G.Khachaturyana* Philosophical Magazine . 2010,第1a4期

机译：具变质边界的铁电固溶体：极化旋转不稳定性，亚稳相共存和纳米域自适应态
3. Ferroelectric solid solutions with morphotropic boundary: Rotational instability of polarization, metastable coexistence of phases and nanodomain adaptive states [J] . Khachaturyan AG Philosophical magazine: structure and properties of condensed matter . 2010,第1a4期

机译：具有变质边界的铁电固溶体：极化的旋转不稳定性，相的亚稳态共存和纳米域自适应态
4. Kinetic model of precipitate growth during phase separation in metastable binary solid solutions [C] . Andrey Sarikov International Conference on Gettering and Defect Engineering in Semiconductor Technology . 2016

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5. A Comprehensive Study on the Subsolidus Phase Relations of the Plagioclase Feldspar Solid Solution [D] . Jin, Shiyun . 2019

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6. Atomic-level structural correlations across the morphotropic phase boundary of a ferroelectric solid solution: xBiMg1/2Ti1/2O3-(1 − x)PbTiO3 [O] . Kaustuv Datta, Reinhard B. Neder, Jun Chen, -1

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7. Elaboration and characterization new ferroelectric solid solution with 'TTB' structure by mechanosynthesis [O] . M. Khachane, A. Castro, M. Elaatmani, 2007

机译：用机械合成用“TTB”结构进行制定和表征新的铁电固溶液
8. METASTABLE A-15 PHASE SUPERCONDUCTORS TRANSFORMED FROM METASTABLE BCC Nb3 X SOLID SOLUTIONS MADE BY HIGH-RATE SPUTTER DEPOSITION [R] . R. Wang, S. D. Dahlgren 1976

机译：可转换的a-15相超导体由高速溅射沉积的亚稳BCC Nb3 X固体溶液转化而成

Metastable ferroelectric phase and crossover in the Ba2NdFeNb4-xTaxO15 TTB solid solution

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