Targeting a medium-entropy perovskite: Single-crystal growth and phase competition in the PbSc1/2Ta1/2O3–PbIn1/2Nb1/2O3–PbIn1/2Ta1/2O3–PbSc1/2Nb1/2O3 system

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Solid State Chemistry Pub Date : 2025-08-08 DOI:10.1016/j.jssc.2025.125565

Ivan G. Sheptun , Valery G. Smotrakov , Inna V. Lisnevskaya , Olga Yu. Grapenko , Anton A. Zabolotnyi , Elizaveta S. Kulikova , Victoria A. Shuvaeva , Nikita V. Ter-Oganessian

{"title":"Targeting a medium-entropy perovskite: Single-crystal growth and phase competition in the PbSc1/2Ta1/2O3–PbIn1/2Nb1/2O3–PbIn1/2Ta1/2O3–PbSc1/2Nb1/2O3 system","authors":"Ivan G. Sheptun , Valery G. Smotrakov , Inna V. Lisnevskaya , Olga Yu. Grapenko , Anton A. Zabolotnyi , Elizaveta S. Kulikova , Victoria A. Shuvaeva , Nikita V. Ter-Oganessian","doi":"10.1016/j.jssc.2025.125565","DOIUrl":null,"url":null,"abstract":"<div><div>Single crystals in the PbSc1/2Ta1/2O3–PbIn1/2Nb1/2O3–PbIn1/2Ta1/2O3–PbSc1/2Nb1/2O3 compositional space were grown by the flux method with the aim of obtaining a medium-entropy perovskite of the nominal composition PbSc1/4In1/4Nb1/4Ta1/4O3. The synthesis yielded two distinct crystal phases: a perovskite-type phase with the composition PbSc0.34In0.16Nb0.12Ta0.38O3 and a pyrochlore-type phase with composition Pb2Sc0.25In0.2Nb0.5TaO6+δ. The crystal structure and elemental distribution were analyzed using scanning electron microscopy, energy-dispersive X-ray spectroscopy, and synchrotron-based powder X-ray diffraction. Dielectric measurements of the perovskite crystal were performed over a broad range of temperatures and frequencies. The results highlight the challenges associated with phase selectivity and cation incorporation during single-crystal growth in multicomponent oxide systems.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"351 ","pages":"Article 125565"},"PeriodicalIF":3.5000,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Solid State Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022459625003895","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}

引用次数: 0

Abstract

Single crystals in the PbSc_1/2Ta_1/2O₃–PbIn_1/2Nb_1/2O₃–PbIn_1/2Ta_1/2O₃–PbSc_1/2Nb_1/2O₃ compositional space were grown by the flux method with the aim of obtaining a medium-entropy perovskite of the nominal composition PbSc_1/4In_1/4Nb_1/4Ta_1/4O₃. The synthesis yielded two distinct crystal phases: a perovskite-type phase with the composition PbSc_0.34In_0.16Nb_0.12Ta_0.38O₃ and a pyrochlore-type phase with composition Pb₂Sc_0.25In_0.2Nb_0.5TaO_6+δ. The crystal structure and elemental distribution were analyzed using scanning electron microscopy, energy-dispersive X-ray spectroscopy, and synchrotron-based powder X-ray diffraction. Dielectric measurements of the perovskite crystal were performed over a broad range of temperatures and frequencies. The results highlight the challenges associated with phase selectivity and cation incorporation during single-crystal growth in multicomponent oxide systems.

Abstract Image

查看原文本刊更多论文

以中熵钙钛矿为目标：PbSc1/2Ta1/2O3-PbIn1/2Nb1/2O3-PbIn1/2Ta1/2O3-PbSc1/2Nb1/2O3体系中的单晶生长和相竞争

采用助熔法生长PbSc1/2Ta1/2O3-PbIn1/2Nb1/2O3-PbIn1/2Ta1/2O3-PbSc1/2Nb1/2O3 - pbsc1 / 2nb1 / 2o3组成空间中的单晶，得到标称组成PbSc1/4In1/4Nb1/4Ta1/4O3的中熵钙钛矿。合成得到两种不同的晶相：钙钛矿型相，组成成分为PbSc0.34In0.16Nb0.12Ta0.38O3；焦绿石型相，组成成分为Pb2Sc0.25In0.2Nb0.5TaO6+δ。利用扫描电子显微镜、能量色散x射线能谱和同步加速器粉末x射线衍射分析了晶体结构和元素分布。钙钛矿晶体的介电测量是在很宽的温度和频率范围内进行的。结果突出了在多组分氧化物体系中单晶生长过程中与相选择性和阳离子掺入相关的挑战。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Solid State Chemistry 化学-无机化学与核化学

CiteScore

6.00

自引率

9.10%

发文量

848

审稿时长

25 days

期刊介绍： Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.