Lattice Structure and Magnetic Behavior of Ga Ion Doped Multiferroics CaMn7O12

摘要：

　　The lattice structure and magnetism of polycrystalline CaMn7-xGaxO12 (x =0, 0.1, 0.2, 0.3, 0.4) synthesized by solid state method have been investigated.The refined x-ray diffraction patterns show that a well single phase Ga doped CaMn7O12 crystals can be obtained by solid state method and their lattice structure is rhombohedral with R-3.The lattice parameter a linearly decreases while parameter c linearly increases with increasing doping concentration, leading to a lattice distortion.Magnetic susceptibility and inverse susceptibility as a function of temperature show that CaMn7-xGaxO12 and undoped CaMn7O12 behave the basically identical magnetic characterization, that is, there are two magnetic phase transitions at 90 K and 40 K.And the antiferromagnetic transitional temperature is not obviously influenced by non-magnetic Ga ions doping.However, the magnetization at temperature lower than 40 K is enhanced and there is a new transitional temperature point observed at temperature range between 40 and 90 K, which indicates that Ga ions participate into the magnetic interaction.

关键词： Multiferroics Lattice structure CaMn7O12 Magnetism Doping

作者: Wen-zhi Li De-xiang Fu Yu-zhuang Liu Yang Wang Liang Xie Yong-tao Li Wei Chen Li-xia Wang Hong-guang Zhang

作者单位: College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, N Department of Physical and Chemical Sciences, North China University of Technology, Beijing 100144, Center of Advanced Functional Ceramics, College of Science, Nanjing University of Posts and Telecomm

会议类型: 国际会议

会议名称: The 2016 China Functional Materials Technology and Industry Forum (2016中国国际功能材料大会暨第九届中国功能材料及其应用学术会议)

会议地点: 重庆

会议语种:英文

页码: 359-364

在线出版日期: 2016-07-25（万方平台首次上网日期，不代表论文的发表时间）