摘要
根据实验数据 ,构造了接近实际纳米晶永磁Pr2 Fe1 4B的样品 ,用微磁学有限元法进行了模拟计算 .计算结果表明 ,晶界处各向异性的下降会导致矫顽力减小、剩磁值增大 ,而晶界处交换作用常数的减小则会使剩磁值减小、矫顽力增大 .通过对实验样品的模拟研究发现 ,晶界处各向异性和交换作用常数的共同减小能够同时拟合出真实的矫顽力和剩磁值 .模拟计算与实验在退磁曲线形状上的差距则说明模拟还存在不足 .
Magnetization behaviour in the nanocrystalline Pr-2 Fe-14 B has been simulated by micromagnetic finite element method. The decrease of anisotropy in an interlayer leads to the drop of coercivity and enhancement of remanence, while the decline of intergrain exchange coupling increases the coercivity and decreases the remanence. The experimental coercivity and remanence may be simultaneously obtained by selecting proper parameters for the interlayer. Unfortunately, it is difficult to simulate the demagnetization curve of the ribbons before many efforts mustbe paid in future.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第3期718-721,共4页
Acta Physica Sinica
基金
国家重点基础研究项目 (批准号 :G19980 613 0 3 )
国家自然科学基金 (批准号 :5 99710 63 )资助的课题~~
