From Magnets to Metals: The Response of Tetragonal Bisdiselenazolyl Radicals to Pressure
文献类型：期刊论文
| 作者 | Leitch, AA ; Lekin, K ; Winter, SM ; Downie, LE ; Tsuruda, H ; Tse, JS ; Mito, M ; Desgreniers, S ; Dube, PA ; Zhang, SJ ; Liu, QQ ; Jin, CQ ; Ohishi, Y ; Oakley, RT |
| 刊名 | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
 |
| 出版日期 | 2011 |
| 卷号 | 133期号:15页码:6051 |
| 关键词 | RESONATING VALENCE-BOND NITROPHENYL NITRONYL NITROXIDE MOLECULAR CONDUCTORS ORGANIC METALS THIAZYL RADICALS BISTHIASELENAZOLYL RADICALS CRYSTAL-STRUCTURE FERMION SYSTEMS GROUND-STATE ENERGY-BANDS |
| ISSN号 | 0002-7863 |
| 通讯作者 | Oakley, RT: Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada. |
| 中文摘要 | The bromo-substituted bisdiselenazolyl radical 4b (R-1 = Et, R-2 = Br) is isostructural with the corresponding chloro-derivative 4a (R-1 = Et, R-2 = Cl), both belonging to the tetragonal space group P $(4) over bar $2(1)m and consisting of slipped pi-stack arrays of undimerized radicals. Variable temperature, ambient pressure conductivity measurements indicate a similar room temperature conductivity near 10(-4) S cm(-1) for the two compounds, but 4b displays a slightly higher thermal activation energy E-act (0.23 eV) than 4a (0.19 eV). Like 4a, radical 4b behaves as a bulk ferromagnet with an ordering temperature of T-C = 1.7.5 K. The coercive field H-c (at 2 K) of 1600 Oe for 4b is, however, significantly greater than that observed for 4a (1370 Oe). High pressure (0-15 GPa) structural studies on both compounds have shown that compression reduces the degree of slippage of the pi-stacks, which gives rise to changes in the magnetic and conductive properties of the radicals. Relatively mild loadings (< 2 GPa) cause an increase in T-C for both compounds, that of 4b reaching a maximum value of 24 K; further compression to 5 GPa leads to a decrease in T-C and loss of magnetization. Variable temperature and pressure conductivity measurements indicate a decrease in E-act with increasing pressure, with eventual conversion of both compounds from a Mott insulating state to one displaying weakly metallic behavior in the region of 7 GPa (for 4a) and 9 GPa (for 4b). |
| 收录类别 | SCI |
| 资助信息 | Natural Sciences and Engineering Research Council of Canada (NSERCC); MEXT of Japan; NSF; MOST of China |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/38493]  |
| 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 | Leitch, AA,Lekin, K,Winter, SM,et al. From Magnets to Metals: The Response of Tetragonal Bisdiselenazolyl Radicals to Pressure[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2011,133(15):6051. |
| APA | Leitch, AA.,Lekin, K.,Winter, SM.,Downie, LE.,Tsuruda, H.,...&Oakley, RT.(2011).From Magnets to Metals: The Response of Tetragonal Bisdiselenazolyl Radicals to Pressure.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,133(15),6051. |
| MLA | Leitch, AA,et al."From Magnets to Metals: The Response of Tetragonal Bisdiselenazolyl Radicals to Pressure".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 133.15(2011):6051. |
入库方式： OAI收割
来源：物理研究所
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