磁性粒子分形聚集体的矫顽力特性

THE PROPERTIES OF COERCIVITY OF FRACTAL AGGREGATES FORMED BY MAGNETIC PARTICLES

该文讨论了分维度对单畴粒子分形聚集体矫顽力的影响，利用偶极场近似，导出了聚集体的矫顽力与维度之间的关系式，结果表明矫顽力随分维度的增加而减小．通过对分维度与堆积密度之间关系的讨论。

In this paper, the effect of fractal dismension (D)in coercivity (H_0)of single-domain particle aggregates is discused. Making use of dpole field approximation,an expression relatng D and H_0 is derived,which states that H_0 is a deoreasing function of D. By analyzing the relati n between D and packing density(p),it is found that th.obtained conclusion is consistent with the existing theoretical and experimental results.