Investigation of structure, specific heat and superconducting transition in Mg1-xAlxB2 (x similar to 0.5)
文献类型：期刊论文
| 作者 | Xiang, JY ; Zheng, DN ; Lang, PL ; Zhao, ZX ; Luo, JL |
| 刊名 | PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
 |
| 出版日期 | 2004 |
| 卷号 | 402期号:4页码:335 |
| 关键词 | MGB2 BORON |
| ISSN号 | 0921-4534 |
| 通讯作者 | Zheng, DN: Chinese Acad Sci, Inst Phys, Natl Supercond Cyclotron Lab, POB 603-38, Beijing 100080, Peoples R China. |
| 中文摘要 | We have carried out structure, magnetic and specific heat measurements on aluminum doped magnetism diboride samples Mg1-xAlxB2 in order to investigate possible superconductivity at the x = 0.5 concentration. A diamagnetic signal was observed in magnetization measurements accompanied by a decrease in resistivity. However, the diamagnetic signal was extremely small as compared to what expected from full diamagnetism. Also, the transition both in magnetization and resistance was very broad. We propose that the diamagnetism is due to a very small amount of superconducting phase such as MgB2 and the resistive transition is due to the percolation behavior. Furthermore, we performed specific heat measurements, which are considered as a tool to investigate the bulk nature of superconducting transition, on the x = 0.5 sample to verify the existence of superconductivity. We observed no evident superconducting transition in the entire temperature region from 2 to 300 K. The undistinguishable data between 0 and 5 T magnetic fields also indicated the absence of bulk superconductivity in the x = 0.5 sample. (C) 2003 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/40297]  |
| 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 | Xiang, JY,Zheng, DN,Lang, PL,et al. Investigation of structure, specific heat and superconducting transition in Mg1-xAlxB2 (x similar to 0.5)[J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS,2004,402(4):335. |
| APA | Xiang, JY,Zheng, DN,Lang, PL,Zhao, ZX,&Luo, JL.(2004).Investigation of structure, specific heat and superconducting transition in Mg1-xAlxB2 (x similar to 0.5).PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS,402(4),335. |
| MLA | Xiang, JY,et al."Investigation of structure, specific heat and superconducting transition in Mg1-xAlxB2 (x similar to 0.5)".PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 402.4(2004):335. |
入库方式： OAI收割
来源：物理研究所
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