Activation Entropy as a Key Factor Controlling the Memory Effect in Glasses
文献类型：期刊论文
| 作者 | Song, Lijian; Xu, Wei; Huo, Juntao; Li, Fushan; Wang, Li-Min; Ediger, M. D.; Wang, Jun-Qiang |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2020 |
| 卷号 | 125期号:13 |
| 关键词 | STRUCTURAL RELAXATION ENTHALPY RECOVERY DIFFUSION DEPENDENCE DYNAMICS VOLUME |
| DOI | 10.1103/PhysRevLett.125.135501 |
| 英文摘要 | As opposed to the common monotonic relaxation process of glasses, the Kovacs memory effect describes an isothermal annealing experiment, in which the enthalpy and volume of a preannealed glass first increases before finally decreasing toward equilibrium. This interesting behavior has been observed for many materials and is generally explained in terms of heterogeneous dynamics. In this Letter, the memory effect in a model Au-based metallic glass is studied using a high-precision high-rate calorimeter. The activation entropy (S*) during isothermal annealing is determined according to the absolute reaction rate theory. We observe that the memory effect appears only when the second-annealing process has a large S*. These results indicate that a large value of S* is a key requirement for observation of the memory effect and this may provide a useful perspective for understanding the memory effect in both thermal and athermal systems |
| 学科主题 | Physics |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/20491]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 作者单位 | 1.Wang, JQ (corresponding author), Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China. 2.Wang, JQ (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, CAS Key Lab Magnet Mat & Devices, Ningbo 315201, Peoples R China. 3.Wang, JQ (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Prov Key Lab Magnet Mat & Applicat Techn, Ningbo 315201, Peoples R China. 4.Wang, JQ (corresponding author), Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Song, Lijian,Xu, Wei,Huo, Juntao,et al. Activation Entropy as a Key Factor Controlling the Memory Effect in Glasses[J]. PHYSICAL REVIEW LETTERS,2020,125(13). |
| APA | Song, Lijian.,Xu, Wei.,Huo, Juntao.,Li, Fushan.,Wang, Li-Min.,...&Wang, Jun-Qiang.(2020).Activation Entropy as a Key Factor Controlling the Memory Effect in Glasses.PHYSICAL REVIEW LETTERS,125(13). |
| MLA | Song, Lijian,et al."Activation Entropy as a Key Factor Controlling the Memory Effect in Glasses".PHYSICAL REVIEW LETTERS 125.13(2020). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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