Nd_3(Fe,Mo)_(29)化合物及其氮化物的磁结构和内禀磁性

Magnetic Transition and the Intrinsic Magnetic Properties of Nd_3 (Fe, Mo)_ (29) Compound and Its Nitride

制备了具有Nd3（Fe，Ti）29型单斜结构的单相铁基金属间化合物Nd3（Fe，Mo）29及其氮化物，详细研究了：其在4．2K～300K之间的磁结构；磁晶各向异性；居里温度Tc，饱和磁化强度σs等内禀磁性。研究结果表明：Nd3（Fe，Mo）29金属间化合物氮化后仍保持母相结构，氮化后的晶胞体积，居里温度Tc和饱和磁化强度σs分别比氮化前提高了5．9％，70．9％，6．6％；N3d（Fe，Mo）29金属间化合物在230K左右存在自族重取向，温度低于230K时，其磁晶各向异性为锥面，温度高于230K时，其磁晶各向异性为易面；氮化后自族重取向消失。

The Nd3 (Fe,Mo)2, compound with the Nd, (Fe,Ti)29-type monoclinic structure and its nitride have been synthesized. The magnetic transition, lattice Parameters, and the intrinsic magnetic properties, including Curie temperature, Tc, saturation magnetization, and magnetocrystalline anisotropy, of the Nd3 (Fe,Mo)29compound have been studied. The results show that the nitride has a structure related to the parent, but the unit cell volume, Curie temperature, To, and saturation magnetization, are 5. 9%,70. 9% and 6. 6%, respectively, greater than those of parent compound. It is also found that the spin reorientation phenomenon occurs at about 230 K in the parent compound, and the magnetocrystalline anisotropy of the Nds (Fe,Mo)2, compound is an easy plane above 230 K and a cone from 4. 2 K to 230 K. After nitrogenation, this spin reorientation phenomenon disappears.