{"title":"掺不同浓度铕的钙钛矿BaTiO3的重合多普勒展宽光谱化学表征","authors":"Mahdi Ghasemifard, Misagh Ghamari","doi":"10.1007/s10832-024-00365-x","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, the relationship between core electron energy band changes and chemical changes occurring at the site of positron annihilation in BaTiO<sub>3</sub>(BTO) doped by different amounts of metallic element Eu was investigated by Coincidence Doppler broadening spectroscopy. The reduction of the background spectrum caused by a simultaneous detection system in Doppler broadening spectroscopy makes it possible to investigate the contribution of high-momentum core electrons in the process of positron annihilation in the BTO: Eu structure. The results obtained from the spectrum in the range of momenta up to 15 × 10<sup>− 3</sup> m<sub>0</sub>c show that with increasing Eu, the contribution of valence electrons in the process of positron annihilation increases, but at higher momenta of the sample containing 0.05 europium compared to the samples containing 0.01 and 0.03% impurity, a higher contribution in the ratio curve in the annihilation process was observed.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"52 4","pages":"297 - 302"},"PeriodicalIF":1.7000,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Chemical characterization of perovskite BaTiO3 doped with different concentrations of Europium via coincidence doppler broadening spectroscopy\",\"authors\":\"Mahdi Ghasemifard, Misagh Ghamari\",\"doi\":\"10.1007/s10832-024-00365-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this study, the relationship between core electron energy band changes and chemical changes occurring at the site of positron annihilation in BaTiO<sub>3</sub>(BTO) doped by different amounts of metallic element Eu was investigated by Coincidence Doppler broadening spectroscopy. The reduction of the background spectrum caused by a simultaneous detection system in Doppler broadening spectroscopy makes it possible to investigate the contribution of high-momentum core electrons in the process of positron annihilation in the BTO: Eu structure. The results obtained from the spectrum in the range of momenta up to 15 × 10<sup>− 3</sup> m<sub>0</sub>c show that with increasing Eu, the contribution of valence electrons in the process of positron annihilation increases, but at higher momenta of the sample containing 0.05 europium compared to the samples containing 0.01 and 0.03% impurity, a higher contribution in the ratio curve in the annihilation process was observed.</p></div>\",\"PeriodicalId\":625,\"journal\":{\"name\":\"Journal of Electroceramics\",\"volume\":\"52 4\",\"pages\":\"297 - 302\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2024-09-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Electroceramics\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10832-024-00365-x\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electroceramics","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10832-024-00365-x","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Chemical characterization of perovskite BaTiO3 doped with different concentrations of Europium via coincidence doppler broadening spectroscopy
In this study, the relationship between core electron energy band changes and chemical changes occurring at the site of positron annihilation in BaTiO3(BTO) doped by different amounts of metallic element Eu was investigated by Coincidence Doppler broadening spectroscopy. The reduction of the background spectrum caused by a simultaneous detection system in Doppler broadening spectroscopy makes it possible to investigate the contribution of high-momentum core electrons in the process of positron annihilation in the BTO: Eu structure. The results obtained from the spectrum in the range of momenta up to 15 × 10− 3 m0c show that with increasing Eu, the contribution of valence electrons in the process of positron annihilation increases, but at higher momenta of the sample containing 0.05 europium compared to the samples containing 0.01 and 0.03% impurity, a higher contribution in the ratio curve in the annihilation process was observed.
期刊介绍：
While ceramics have traditionally been admired for their mechanical, chemical and thermal stability, their unique electrical, optical and magnetic properties have become of increasing importance in many key technologies including communications, energy conversion and storage, electronics and automation. Electroceramics benefit greatly from their versatility in properties including:
-insulating to metallic and fast ion conductivity
-piezo-, ferro-, and pyro-electricity
-electro- and nonlinear optical properties
-feromagnetism.
When combined with thermal, mechanical, and chemical stability, these properties often render them the materials of choice.
The Journal of Electroceramics is dedicated to providing a forum of discussion cutting across issues in electrical, optical, and magnetic ceramics. Driven by the need for miniaturization, cost, and enhanced functionality, the field of electroceramics is growing rapidly in many new directions. The Journal encourages discussions of resultant trends concerning silicon-electroceramic integration, nanotechnology, ceramic-polymer composites, grain boundary and defect engineering, etc.
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