Chemical influence on beta-relaxations and the formation of molecule-like metallic glasses
文献类型：期刊论文
| 作者 | Yu, HB ; Samwer, K ; Wang, WH ; Bai, HY |
| 刊名 | NATURE COMMUNICATIONS
 |
| 出版日期 | 2013 |
| 卷号 | 4 |
| ISSN号 | 2041-1723 |
| 通讯作者 | Samwer, K (reprint author), Univ Gottingen, Inst Phys, D-37077 Gottingen, Germany. |
| 中文摘要 | Secondary (also known as Johari-Goldstein or beta-) relaxations are an intrinsic feature of supercooled liquids and glasses. They are important in many respects but the underlying mechanisms are not well understood. A long-standing puzzle is why some glasses show beta-relaxations as pronounced peaks, whereas others as unobvious excess wings. Here we demonstrate that these different behaviours are related to the fluctuations of chemical interactions by using prototypical systems of metallic glasses. A general rule is summarized: pronounced beta-relaxations are associated with systems where all the atomic pairs have large similar negative values of enthalpy of mixing, whereas positive or significant fluctuations in enthalpy of mixing suppress beta-relaxations. The emerging physical picture is that strong and comparable interactions among all the constituting atoms maintain string-like atomic configurations for the excitations of beta-events and can be considered as the formation of molecule-like metallic glasses. |
| 资助信息 | Alexander von Humboldt Foundation; German Science Foundation [FOR 1394]; Leibniz-Program [Sa 337/10-1]; NSF of China [51271195] |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/56813]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Yu, HB,Samwer, K,Wang, WH,et al. Chemical influence on beta-relaxations and the formation of molecule-like metallic glasses[J]. NATURE COMMUNICATIONS,2013,4. |
| APA | Yu, HB,Samwer, K,Wang, WH,&Bai, HY.(2013).Chemical influence on beta-relaxations and the formation of molecule-like metallic glasses.NATURE COMMUNICATIONS,4. |
| MLA | Yu, HB,et al."Chemical influence on beta-relaxations and the formation of molecule-like metallic glasses".NATURE COMMUNICATIONS 4(2013). |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。