Effects of interstitial H and/or C atoms on the magnetic and magnetocaloric properties of La(Fe, Si)(13)-based compounds
文献类型：期刊论文
| 作者 | Zhang, H ; Hu, FX ; Sun, JR ; Shen, BG |
| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
 |
| 出版日期 | 2013 |
| 卷号 | 56期号:12页码:2302 |
| 关键词 | H atom C atom La(Fe Si)(13) |
| ISSN号 | 1674-7348 |
| 通讯作者 | Shen, BG (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | La(Fe, Si)(13)-based compounds have been considered as promising candidates for magnetic refrigerants particularly near room temperature. Herein we review recent progress particularly in the study of the effects of interstitial H and/or C atoms on the magnetic and magnetocaloric properties of La(Fe, Si)(13) compounds. By introducing H and/or C atoms, the Curie temperature T-C increases notably with the increase of lattice expansion which makes the Fe 3d band narrow and reduces the overlap of the Fe 3d wave functions. The first-order itinerant-electron metamagnetic transition is conserved and the MCE still remains high after hydrogen absorption. In contrast, the characteristic of magnetic transition varies from first-order to second-order with the increase of C concentration, which leads to remarkable reduction of thermal and magnetic hysteresis. In addition, the introduction of interstitial C atoms promotes the formation of NaZn13-type (1:13) phase in La(Fe, Si)(13) compounds, and thus reducing the annealing time significantly from 40 days for LaFe11.7Si1.3 to a week for LaFe11.7Si1.3C0.2. The pre-occupied interstitial C atoms may depress the rate of hydrogen absorption and release, which is favorable to the accurate control of hydrogen content. It is found that the reduction of particle size would greatly depress the hysteresis loss and improve the hydrogenation process. By the incorporation of both H and C atoms, large MCE without hysteresis loss can be obtained in La(Fe, Si)(13) compounds around room temperature, for instance, La0.7Pr0.3Fe11.5Si1.5C0.2H1.2 exhibits a large vertical bar Delta S-M vertical bar of 22.1 J/(kg.K) at T-C = 321 K without hysteresis loss for a field change of 0-5 T. |
| 资助信息 | National Natural Science Foundation of China; Hi-Tech Research and Development program of China; Key Research Program of the Chinese Academy of Sciences; National Basic Research Program of China; Fundamental Research Funds for the Central Universities |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/56932]  |
| 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 | Zhang, H,Hu, FX,Sun, JR,et al. Effects of interstitial H and/or C atoms on the magnetic and magnetocaloric properties of La(Fe, Si)(13)-based compounds[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2013,56(12):2302. |
| APA | Zhang, H,Hu, FX,Sun, JR,&Shen, BG.(2013).Effects of interstitial H and/or C atoms on the magnetic and magnetocaloric properties of La(Fe, Si)(13)-based compounds.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,56(12),2302. |
| MLA | Zhang, H,et al."Effects of interstitial H and/or C atoms on the magnetic and magnetocaloric properties of La(Fe, Si)(13)-based compounds".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 56.12(2013):2302. |
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。