...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Research >Role of annealing conditions on the ferromagnetic and dielectric properties of La_2NiMnO_6
【24h】

Role of annealing conditions on the ferromagnetic and dielectric properties of La_2NiMnO_6

机译：退火条件对La_2NiMnO_6铁磁和介电性能的影响

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

La_2NiMnO_6 (LNMO) was prepared by a combustion method followed by heating at high temperature. Subsequently, the preformed LNMO was annealed in air, oxygen, or N2 atmosphere and characterized by powder x-ray diffraction (XRD), neutron diffraction, superconducting quantum interference device magnetometry, and dielectric analysis. Structural studies by XRD and neutron diffraction revealed the coexistence of partially cation disordered monoclinic (31%) and rhombohedral (69%) phases in the sample annealed in air. However, the sample annealed in oxygen shows about 50:50% of monoclinic and rhombohedral phases. Relaxor-like behavior with relative permittivity of the order of 104 was observed in the sample annealed in air, while relative permittivity decreases to about 200 in samples annealed in oxygen atmosphere. The magnetic properties indicate a well-defined ferromagnetic phase in the oxygen-annealed sample compared to a feeble ferromagnetic signature in the air-annealed one. The dielectric and ferromagnetism of LNMO samples have been related to formation and annihilation of oxygen vacancies.
机译：La_2NiMnO_6（LNMO）通过燃烧方法制备，然后在高温下加热。随后，将预制的LNMO在空气，氧气或N2气氛中进行退火，并通过粉末X射线衍射（XRD），中子衍射，超导量子干涉仪磁力测定和介电分析进行表征。通过XRD和中子衍射进行的结构研究表明，在空气中退火的样品中，部分阳离子无序单斜晶相（31％）和菱面体相（69％）共存。但是，在氧气中退火的样品显示出约50：50％的单斜相和菱形面相。在空气中退火的样品中观察到弛豫样行为，相对介电常数约为104，而在氧气气氛中退火的样品中，相对介电常数降低到约200。与空气退火样品中微弱的铁磁特征相比，磁性能表明氧退火样品中具有明确的铁磁相。 LNMO样品的介电和铁磁性与氧空位的形成和an灭有关。

著录项

  • 来源
    《Journal of Materials Research》 |2011年第4期|p.567-577|共11页
  • 作者

    Farheen N. Sayed; S.N. Achary; O.D. Jayakumar; S.K. Deshpande; P.S.R. Krishna; S. Chatterjee; P. Ayyub; A.K. Tyagi;

  • 作者单位

    Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India;

    Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India;

    Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India;

    UGC-DAE Consortium for Scientific Research, Bhabha Atomic Research Centre, Mumbai 400085, India;

    Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India;

    Department of Condensed Matter Physics, Tata Institute of Fundamental Research, Mumbai 400005, India;

    Department of Condensed Matter Physics, Tata Institute of Fundamental Research, Mumbai 400005, India;

    Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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