Thermal conductivity reduction and crystal properties evolution in iron silicides induced by doping

IF 2.1 4区 物理与天体物理 Q3 PHYSICS, CONDENSED MATTER
Sopheap Sam , Kosuke Yamazaki , Hiroshi Nakatsugawa
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引用次数: 0

Abstract

Understanding the thermal transport behaviors in the crystal lattice is important for designing semiconducting materials in thermal management. In this work, we investigate the mechanism of the decrease in thermal properties of β-FeSi2 when Co dopant is introduced to the host crystal. The crystallite size decreases as Co doping increases from 0 to 5 %. The micro-strain and stress increase with increasing doping levels. The decrease in crystallite size and increase in micro-strain/stress indicate the origin of phonons scattering and lattice softening, leading to the reduction in thermal conductivity. This study provides insights into the correlation between the crystal properties evolution and thermal transport in metal silicide compounds which could be useful in thermal-to-energy conversion applications.

Abstract Image

掺杂诱导硅化铁的热导率降低和晶体性质演变
了解晶格中的热传输行为对于设计热管理半导体材料非常重要。在这项工作中,我们研究了当主晶中引入掺杂 Co 时,β-FeSi2 热性能下降的机理。随着钴掺杂量从 0% 增加到 5%,晶体尺寸减小。微应变和应力随着掺杂水平的增加而增加。晶粒尺寸的减小和微应变/应力的增加表明,声子散射和晶格软化是导致热导率降低的原因。这项研究深入揭示了金属硅化物的晶体特性演变与热传输之间的相关性,可用于热能转换应用。
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来源期刊
Solid State Communications
Solid State Communications 物理-物理:凝聚态物理
CiteScore
3.40
自引率
4.80%
发文量
287
审稿时长
51 days
期刊介绍: Solid State Communications is an international medium for the publication of short communications and original research articles on significant developments in condensed matter science, giving scientists immediate access to important, recently completed work. The journal publishes original experimental and theoretical research on the physical and chemical properties of solids and other condensed systems and also on their preparation. The submission of manuscripts reporting research on the basic physics of materials science and devices, as well as of state-of-the-art microstructures and nanostructures, is encouraged. A coherent quantitative treatment emphasizing new physics is expected rather than a simple accumulation of experimental data. Consistent with these aims, the short communications should be kept concise and short, usually not longer than six printed pages. The number of figures and tables should also be kept to a minimum. Solid State Communications now also welcomes original research articles without length restrictions. The Fast-Track section of Solid State Communications is the venue for very rapid publication of short communications on significant developments in condensed matter science. The goal is to offer the broad condensed matter community quick and immediate access to publish recently completed papers in research areas that are rapidly evolving and in which there are developments with great potential impact.
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