• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Zeitschrift fur Physik, B. Condensed Matter >Interfacial polarisation effect on the interlayer couplings in Co/Rh sandwiches
【24h】

Interfacial polarisation effect on the interlayer couplings in Co/Rh sandwiches

机译：界面极化对Co / Rh三明治夹层耦合的影响

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

The structural, magnetic and transport properties of Co/Rh sandwiches grown by ultra high vacuum evaporation and sputtering have been studied. High-energy electron diffraction observations during the growth reveal that both Co and Rh layers have been stabilised in the (111) fcc structure for the evaporated sandwiches. X-ray measurements performed on sputtered samples show a predominant fcc polycrystalline structure of the stacks with a preferential (111) texture. Magnetisation and magnetoresistance measurements show a very strong antiferromagnetic exchange coupling for thin Rh layers, reaching 39 erg/cm~2 for 4.8 A Rh, the strongest ever observed in exchange coupled systems. This value is in good agreement with the value of 38 erg/cm~2 obtained by ab initio calculations for Co/Rh (hcp) superlattices. This is explained by the magnetic nature of the Co/Rh interfaces. Indeed, the variation of the measured saturation magnetisation as a function of the Co layer thickness shows no evidence of Co moment reduction for the Co atoms located at the interfaces, even for the very thin layers. The value of the preserved magnetic moments of the cobalt atoms at the interfaces is confirmed by ab initio calculations for (Co/Rh superlattices taking the intermixing into account.
机译：研究了通过超高真空蒸发和溅射生长的Co / Rh三明治的结构，磁性和传输性能。生长过程中的高能电子衍射观察表明，Co和Rh层均已稳定在（111）fcc结构中，用于蒸发的三明治。对溅射样品进行的X射线测量显示出堆叠的主要fcc多晶结构，具有优先的（111）织构。磁化和磁阻测量表明，对于薄Rh层，反铁磁交换耦合非常强，对于4.8 A Rh，达到39 erg / cm〜2，这是在交换耦合系统中观察到的最强强度。该值与Co / Rh（hcp）超晶格的从头算得到的38 erg / cm〜2的值非常吻合。这可以通过Co / Rh界面的磁性来解释。实际上，所测得的饱和磁化强度随Co层厚度的变化，即使对于非常薄的层，也没有证据表明位于界面处的Co原子的Co矩减小。钴原子在界面处保留的磁矩的值是通过（Co / Rh超晶格从头计算）并考虑到相互混合来确定的。

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