广西科学2019，Vol.26Issue(4)：378-384,7.DOI:10.13656/j.cnki.gxkx.20190808.003
MnBi1-xCrx(x=0.04,0.08,0.12,0.16)合金的晶体结构与磁性能
Crystal Structure and Magnetic Properties of MnBi 1-x Crx (x=0.04,0.08,0.12,0.16)Alloys
摘要
Abstract
MnBi1－x Cr x (x=0. 04，0. 08，0. 12，0. 16)series alloys were prepared by vacuum arc melting method. The crystal structure and magnetic properties of the series alloy samples were investigated and determined by X-ray diffraction(XRD)，Rietveld full-spectrum fitting and vibrating sample magnetometer (VSM).The results show that main phase of the annealed sample is a low temperature phase(LTP)MnBi (space group:P63/mmc(194)).Rietveld method is used to determine the content of each phase in each sample and to analyze the crystal structure of the main phase MnBi1-X Crx. The atomic distance dM-M between M (M = Bi，Cr) atoms increases with the increase of doping amount. The M atom and Mn atom distance dM-Mn decreases with the increase of doping amount. At 400 K，it tends to be saturated，and when the doping amount is less than x=0.12，the saturation magnetization increases with the increase of doping amount. When the doping amount is greater than x=0. 12，the saturation magnetization has reached saturation， which is 20.55 emμ/g，and does not vary with the change in doping content. As the test temperature increases，the coercivity of the alloy increases. The Debye temperatures of MnBi1-x Crx(x=0.04，0.08，0. 12， 0 .16)are 378. 46 K，369. 52 K，354. 62 K and 351.64 K，respectively.关键词
MnBi掺杂/Rietveld全谱拟合/晶体结构/磁性能Key words
MnBi doping/Rietveld/crystal structure/magnetic properties分类
信息技术与安全科学引用本文复制引用
黄国任,黄金辉,杨通晗,王涛,何维..MnBi1-xCrx(x=0.04,0.08,0.12,0.16)合金的晶体结构与磁性能[J].广西科学,2019,26(4):378-384,7.基金项目
国家自然科学基金项目(51861003)资助. （51861003）
