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Co和稳定元素对Nd3(Fe,Co,M)29(M=Ti,V,Cr) 化合物结构和磁性的影响

郭鸿涌 刘宝丹 唐宁 罗鸿志 李养贤 杨伏明 吴光恒

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Co和稳定元素对Nd3(Fe,Co,M)29(M=Ti,V,Cr) 化合物结构和磁性的影响

郭鸿涌, 刘宝丹, 唐宁, 罗鸿志, 李养贤, 杨伏明, 吴光恒

The effect of Co substitution and stabilizing element on the structure and magnetic properties of Nd3(Fe,Co,M)29(M=Ti,V,Cr) compounds

Guo Hong-Yong, Liu Bao-Dan, Tang Ning, Luo Hong-Zhi, Li Yang-Xian, Yang Fu-Ming, Wu Guang-Heng
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  • 利用x射线衍射和磁测量研究了不同稳定元素Co以及Ti,V和Cr替代对Nd3Fe29-x-yCoxMy(M=Ti,V,Cr)化合物结构和磁性的影响.研究发现:每一个稳定元素都有一替代量极限,在此极限以内所有化合物均为Nd3(Fe,Ti)29型结构,A2/m空间群.不同稳定元素的溶解极限不同.Co的替代量与稳定元素有关,当以Cr作为稳定元素时,Cr的替代量随着Co含量的提高而提高
    The effect of Co substitution and stabilizing elements on the structure and magnetic properties of Nd3Fe29-x-yCoxMy(M=Ti,V,Cr) compounds was investigated by means of x-ray diffraction and magnetic measurements. The results show that all the synthesized compounds have been crystallized in Nd3(Fe,Ti)29type structure with monoclinic symmetry and space group A2/m. The solution of Co element in the compounds is different for the different stabilizing elements. For Cr as the stabilizing element, the pure Co-based 3:29 phase could be obtained and the higher Cr content is required to stabilize the phase with increasing Co content. For Ti and V, the solution of Co in the compounds could be only 6.63 and 12 atoms, respectively. All the Nd3(Fe, Co, M)29compounds show easy-planar type anisotropy at room temperature. For the Nd3(Fe,Co,V)29compounds, the Curie temperature and saturation magnetization increase first and then decrease with further increasing Co content. The spin reorientation temperature shows and increasing tendency except the minimum for x=6 due to the preferential occupation of Co atoms. For the Nd3(Fe, Co, Cr)29compounds, the Curie temperature increases first and then decreases with increasing Co content, but the magnetization is diffcult to be saturated and only shows a decreasing tendency. The spin reorientation transition was only observed for the samples with x=0 and 6.
    • 基金项目: 国家自然科学基金(批准号:G2000067106)资助的课题.
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  • 文章访问数:  6916
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出版历程
  • 收稿日期:  2003-06-02
  • 修回日期:  2003-07-08
  • 刊出日期:  2004-01-15

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