Si对Nd2Fe14B四方相结构和磁性的影响

本文对Si加入Nd₂Fe₁₄B四方相后所形成的合金相的结构和磁性进行了研究。结果表明,Si加入Nd₂Fe₁₄B四方相后并不破坏它的结构(Si的含量可达B的两倍),而形成Nd₂(Fe,Si)₁₄B赝三元金属间化合物。随着Si含量的增加,晶格常数和饱和磁化强度随之减小,但居里温度则随之增加。Si的加入,并不改变Nd₂Fe₁₄B的室温各向 关键词：

EFFECTS OF Si ON THE STRUCTURE AND MAGNETIC PROPERTIES OF TETRAGONAL COMPOUND Nd2Fe14B

An investigation is made on the structure and magnetic properties of the tetragonal phase Nd₂Fe₁₄ B as influenced by addition of Si. The results show that: Si (up to a content of as much as twice that of B) does not destroy the tetragonal structure of Nd₂Fe₁₄B, but forms a pseudo-ternary intermetallic compound Nd₂(Fe, Si)₁₄B. The lattice constants and saturation magnetization of Nd₂ (Fe, Si)₁₄-B decrease and its Curie temperature increases with increasing Si content. The magnitude of the anisotropy field and the easy direction of magnetization of Nd₂Fe₁₄B at room temperature are not affected by the addition of Si. The inclusion of Si in Nd₂Fe₁₄B has a great influence on the magnetic anisotropy of Nd₂Fe₁₄B at low temperatures, showing an increase in the angle between c-axis and the direction of easy cone.