Search Advanced
2018 Volume 27 Issue 3
Article Contents
Previous Article Next Article

Jian-Hong Dai, Qing Zhao, Qian Sun, Shuo Zhang, Xiao Wang, Xu-Dong Shen, Zhe-Hong Liu, Xi Shen, Ri-Cheng Yu, Ting-Shan Chan, Lun-Xiong Li, Guang-Hui Zhou, Yi-feng Yang, Chang-Qing Jin, You-Wen Long. 2018: Formation of unusual Cr5+ charge state in CaCr0.5Fe0.5O3 perovskite, Chinese Physics B, 27(3): 433-438. doi: 10.1088/1674-1056/27/3/037503
Citation: Jian-Hong Dai, Qing Zhao, Qian Sun, Shuo Zhang, Xiao Wang, Xu-Dong Shen, Zhe-Hong Liu, Xi Shen, Ri-Cheng Yu, Ting-Shan Chan, Lun-Xiong Li, Guang-Hui Zhou, Yi-feng Yang, Chang-Qing Jin, You-Wen Long. 2018: Formation of unusual Cr5+ charge state in CaCr0.5Fe0.5O3 perovskite, Chinese Physics B, 27(3): 433-438. doi: 10.1088/1674-1056/27/3/037503
shu

Formation of unusual Cr5+ charge state in CaCr0.5Fe0.5O3 perovskite

  • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China

  • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

  • Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201203, China

  • "National" Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu 30076, Taiwan, China

  • Institute for Brain Research and Rehabilitation, South China Normal University, Guangzhou 510631, China

  • Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications of Hunan, Hunan Normal University, Changsha 410081, China

  • Available Online: 01/01/2018
  • Fund Project: the National Natural Science Foundation of China(Grant .11574378,51772324,and 61404052)%the National Basic Research Program of China(Grant 2014CB921500)%the Chinese Academy of Sciences(Grant .YZ201555,QYZDB-SSW-SLH013,GJHZ1773,and XDB07030300)
  • A new oxide CaCr0.5Fe0.5O3 was prepared under high pressure and temperature conditions.It crystallizes in a B-site disordered Pbnm perovskite structure.The charge combination is determined to be CrS+/Fe3+ with the presence of unusual Cr5+ state in octahedral coordination,although Cr4+ and Fe4+ occur in the related perovskites CaCrO3 and CaFeO3.The randomly distributed Cr5+ and Fe3+ spins lead to short-range ferromagnetic coupling,whereas an antiferromagnetic phase transition takes place near 50 K due to the Fe3+-O-Fe3+ interaction.In spite of the B-site Cr5+/Fe3+ disorder,the compound exhibits electrical insulating behavior.First-principles calculations further demonstrate the formation of CaCr0.55+Fe0.53+O3 charge combination,and the electron correlation effect of Fe3+ plays an important role for the insulting ground state.CaCr0.5Fe0.5O3 provides the first Cr5+ perovskite system with octahedral coordination,opening a new avenue to explore novel transition-metal oxides with exotic charge states.
  • 加载中
  • 加载中
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索
Export Citation
PDF
XML

Article Metrics

Article views(76) PDF downloads(0) Cited by(0)

Access History

Formation of unusual Cr5+ charge state in CaCr0.5Fe0.5O3 perovskite

  • Available Online: 01/01/2018

Abstract: A new oxide CaCr0.5Fe0.5O3 was prepared under high pressure and temperature conditions.It crystallizes in a B-site disordered Pbnm perovskite structure.The charge combination is determined to be CrS+/Fe3+ with the presence of unusual Cr5+ state in octahedral coordination,although Cr4+ and Fe4+ occur in the related perovskites CaCrO3 and CaFeO3.The randomly distributed Cr5+ and Fe3+ spins lead to short-range ferromagnetic coupling,whereas an antiferromagnetic phase transition takes place near 50 K due to the Fe3+-O-Fe3+ interaction.In spite of the B-site Cr5+/Fe3+ disorder,the compound exhibits electrical insulating behavior.First-principles calculations further demonstrate the formation of CaCr0.55+Fe0.53+O3 charge combination,and the electron correlation effect of Fe3+ plays an important role for the insulting ground state.CaCr0.5Fe0.5O3 provides the first Cr5+ perovskite system with octahedral coordination,opening a new avenue to explore novel transition-metal oxides with exotic charge states.

    HTML

Reference (0)

Catalog

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return