【摘要】 在外加磁化场的作用下,磁性液体的介电特性表现出与一般物质所不同的新效应——磁电方向效应,即介电常数不但依赖于外加磁化场的大小,而且还依赖于外加磁化场与电场之间的相对方向。 根据实验观察到的磁性液体中的磁性颗粒呈球形,在外加磁化场的作用下,磁性颗粒呈长链形分布的这一实验事实,我们用长链模型进行理论分析,合理地解释了磁电方向效应。理论与实验结果符合。更多还原

【Abstract】 When the ferrofluid is magnetized with biasing field, it’s dielectric characteristics shows a magnetoelectric directive e(?)ct, i.e., the dielectric constant depend on not only the magnetic field, but also the relativf direction between the electric field and the magnetic field.In experiments, it has been observed that the magnetic particles in the ferrofluid are of spherical shape, and when magnetized with biasing field, they take a long-chain type distribution.In this paper, we analyze experimental results mentioned above and explain the magne-toelectric directive effects with long-chain model. The theoretical results are in agreement with experimental work.更多还原