电子束在TEM中诱导Mn氧化：俄歇激发的加热效应。

IF 2.5 3区工程技术 Q1 MICROSCOPY

Micron Pub Date : 2024-12-03 DOI:10.1016/j.micron.2024.103763

Sung Bo Lee , Jihye Kwon , Hyoung Seop Kim

{"title":"电子束在TEM中诱导Mn氧化：俄歇激发的加热效应。","authors":"Sung Bo Lee , Jihye Kwon , Hyoung Seop Kim","doi":"10.1016/j.micron.2024.103763","DOIUrl":null,"url":null,"abstract":"<div><div>Electron-beam irradiation of <em>α</em>-Mn triggers dramatic microstructural transformations. Transmission electron microscopy (TEM) reveals localized thinning and MnO formation within the irradiated area. Reduced thermal conductivity due to thinning suggests significant local temperature rise by electron-beam irradiation. Finite element analysis (FEA) identifies Auger excitation as the dominant heating mechanism, surging temperatures to ∼2300 K with ultrafast cooling. Our findings indicate that the oxidation of Mn under electron-beam irradiation is primarily attributed to beam heating via Auger excitation, rather than defect formation through sputtering. This conclusion is supported by the fact that the maximum energy transferable from the incident electron beam in TEM is below the minimum displacement energy for Mn.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"190 ","pages":"Article 103763"},"PeriodicalIF":2.5000,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Electron-beam induced Mn oxidation in TEM: Insights into the heating effect of Auger excitation\",\"authors\":\"Sung Bo Lee , Jihye Kwon , Hyoung Seop Kim\",\"doi\":\"10.1016/j.micron.2024.103763\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Electron-beam irradiation of <em>α</em>-Mn triggers dramatic microstructural transformations. Transmission electron microscopy (TEM) reveals localized thinning and MnO formation within the irradiated area. Reduced thermal conductivity due to thinning suggests significant local temperature rise by electron-beam irradiation. Finite element analysis (FEA) identifies Auger excitation as the dominant heating mechanism, surging temperatures to ∼2300 K with ultrafast cooling. Our findings indicate that the oxidation of Mn under electron-beam irradiation is primarily attributed to beam heating via Auger excitation, rather than defect formation through sputtering. This conclusion is supported by the fact that the maximum energy transferable from the incident electron beam in TEM is below the minimum displacement energy for Mn.</div></div>\",\"PeriodicalId\":18501,\"journal\":{\"name\":\"Micron\",\"volume\":\"190 \",\"pages\":\"Article 103763\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2024-12-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Micron\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S096843282400180X\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MICROSCOPY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Micron","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S096843282400180X","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MICROSCOPY","Score":null,"Total":0}

引用次数: 0

摘要

α-Mn的电子束辐照引发了显著的微观结构转变。透射电子显微镜（TEM）显示局部变薄和MnO的形成在辐照区域。由于变薄导致的热导率降低表明电子束辐照使局部温度显著升高。有限元分析（FEA）确定了俄歇激发是主要的加热机制，温度飙升至~ 2300 K，并具有超快冷却。我们的研究结果表明，Mn在电子束照射下的氧化主要是由于通过俄热激发的光束加热，而不是通过溅射形成缺陷。从入射电子束在TEM中转移的最大能量低于Mn的最小位移能，这一事实支持了这一结论。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Electron-beam induced Mn oxidation in TEM: Insights into the heating effect of Auger excitation

Electron-beam irradiation of α-Mn triggers dramatic microstructural transformations. Transmission electron microscopy (TEM) reveals localized thinning and MnO formation within the irradiated area. Reduced thermal conductivity due to thinning suggests significant local temperature rise by electron-beam irradiation. Finite element analysis (FEA) identifies Auger excitation as the dominant heating mechanism, surging temperatures to ∼2300 K with ultrafast cooling. Our findings indicate that the oxidation of Mn under electron-beam irradiation is primarily attributed to beam heating via Auger excitation, rather than defect formation through sputtering. This conclusion is supported by the fact that the maximum energy transferable from the incident electron beam in TEM is below the minimum displacement energy for Mn.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Micron 工程技术-显微镜技术

CiteScore

4.30

自引率

4.20%

发文量

100

审稿时长

31 days

期刊介绍： Micron is an interdisciplinary forum for all work that involves new applications of microscopy or where advanced microscopy plays a central role. The journal will publish on the design, methods, application, practice or theory of microscopy and microanalysis, including reports on optical, electron-beam, X-ray microtomography, and scanning-probe systems. It also aims at the regular publication of review papers, short communications, as well as thematic issues on contemporary developments in microscopy and microanalysis. The journal embraces original research in which microscopy has contributed significantly to knowledge in biology, life science, nanoscience and nanotechnology, materials science and engineering.