• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Enhanced magnetic hardness in a nanoscale metal-organic hybrid ferrimagnet
【24h】

Enhanced magnetic hardness in a nanoscale metal-organic hybrid ferrimagnet

机译：纳米级金属-有机杂化铁磁体中增强的磁硬度

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A new layered metal-organic hybrid compound, namely, [Co _3(μ _3-OH) _2(BTP) _2] (1; BTP=4-(3-bromothienyl)phosphonate), is reported. The inorganic layer can be viewed as a pseudo-Kagomé lattice composed of corner-sharing irregular triangles of Co _3(μ _3-OH), with the cavities filled with the PO _3 groups. The interlayer space is occupied by the 3-bromothienyl groups of BTP ~(2-). The bulk sample of compound 1 experiences a long-range ferromagnetic ordering below 30.5 K, with a coercivity (H _c) of 5.04 kOe at 5 K. A systematic study on the size-dependent magnetic coercivity of 1 reveals that the coercivity of 1 increases with reduced particle size from the micrometer to the nanometer scale. When the particle size is about 50-200 nm, the coercivity reaches 24.2 kOe at 5 K. The results demonstrate that compound 1 can vary from a soft magnet to one of the hardest molecule-based magnets, simply by reducing the particle size to nanoscale region. Size-dependent magnetism: By reducing the particle size to the nanoscale region, [Co _3(μ _3-OH) _2(BTP) _2] (1; BTP=4-(3-bromothienyl)phosphonate, T _c=30.5 K) can, at low temperature, transform from a soft magnet to one of the hardest molecule-based magnets know to date (see figure; MP=microparticle, NP=nanoparticle).
机译：报道了一种新的层状金属-有机杂化化合物，即[Co _3（μ_3-OH）_2（BTP）_2]（1; BTP = 4-（3-溴噻吩基）膦酸酯）。无机层可以看做是由Co _3（μ_3-OH）的边角共享不规则三角形组成的伪Kagomé晶格，其空腔填充有PO _3基团。层间空间被BTP〜（2-）的3-溴噻吩基占据。化合物1的大量样品在30.5 K以下经历了远距离铁磁有序，在5 K时的矫顽力（H _c）为5.04 kOe。对尺寸相关的磁矫顽力1的系统研究表明，矫顽力1会增加具有从微米到纳米级的减小的粒度。当粒径约为50-200 nm时，矫顽力在5 K时达到24.2 kOe。结果表明，化合物1可以通过将粒径减小至纳米级而从软磁体变为最坚硬的分子基磁体之一地区。尺寸依赖的磁性：通过将颗粒尺寸减小至纳米级区域，[Co _3（μ_3-OH）_2（BTP）_2]（1; BTP = 4-（3-溴噻吩基）膦酸酯，T _c = 30.5 K）可以在低温下从软磁体转变为迄今为止已知的最坚硬的基于分子的磁体之一（见图; MP =微粒，NP =纳米颗粒）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号