{"title":"振荡金属膜振动位错阻尼的瞬态热反射研究","authors":"K. Jagannadham","doi":"10.1007/s11661-024-07516-3","DOIUrl":null,"url":null,"abstract":"<p>Transient thermoreflectance (TTR) signal generated from pulse laser-induced oscillation of delaminated metal films of Al, W, and In is determined and the acoustic contribution due to strain is evaluated. The decay in the amplitude of the acoustic oscillations is modeled in terms of Granato–Lṻcke theory of vibrating dislocations with mobility restricted under drag exerted by electron scattering. The values of the relative energy loss factor from the experimental observations and from dislocation modeling are shown to correlate well using the expected dislocation density in annealed metal foils.</p>","PeriodicalId":18504,"journal":{"name":"Metallurgical and Materials Transactions A","volume":"1 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Transient Thermoreflectance Investigation of Damping from Vibrating Dislocations in Oscillating Metal Films\",\"authors\":\"K. Jagannadham\",\"doi\":\"10.1007/s11661-024-07516-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Transient thermoreflectance (TTR) signal generated from pulse laser-induced oscillation of delaminated metal films of Al, W, and In is determined and the acoustic contribution due to strain is evaluated. The decay in the amplitude of the acoustic oscillations is modeled in terms of Granato–Lṻcke theory of vibrating dislocations with mobility restricted under drag exerted by electron scattering. The values of the relative energy loss factor from the experimental observations and from dislocation modeling are shown to correlate well using the expected dislocation density in annealed metal foils.</p>\",\"PeriodicalId\":18504,\"journal\":{\"name\":\"Metallurgical and Materials Transactions A\",\"volume\":\"1 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-07-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Metallurgical and Materials Transactions A\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1007/s11661-024-07516-3\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metallurgical and Materials Transactions A","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1007/s11661-024-07516-3","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
测定了由脉冲激光诱导的 Al、W 和 In 分层金属膜振荡产生的瞬态热反射 (TTR) 信号，并评估了应变引起的声学贡献。声学振荡振幅的衰减是根据在电子散射阻力作用下流动性受限的振动位错的 Granato-Lṻcke 理论建模的。实验观测和位错建模得出的相对能量损失因子值与退火金属箔中的预期位错密度相关。
Transient Thermoreflectance Investigation of Damping from Vibrating Dislocations in Oscillating Metal Films
Transient thermoreflectance (TTR) signal generated from pulse laser-induced oscillation of delaminated metal films of Al, W, and In is determined and the acoustic contribution due to strain is evaluated. The decay in the amplitude of the acoustic oscillations is modeled in terms of Granato–Lṻcke theory of vibrating dislocations with mobility restricted under drag exerted by electron scattering. The values of the relative energy loss factor from the experimental observations and from dislocation modeling are shown to correlate well using the expected dislocation density in annealed metal foils.
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