Effects of the sweep rate of the applied field on the agglomeration of magnetic particles in magnetic fluid film

被引:3
作者
Horng, HE
Yang, SY
Chen, CH
Chiu, YP
Chen, JA
Hong, CY
Yang, HC
机构
[1] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan
[2] Natl Taiwan Normal Univ, Dept Phys, Taipei 116, Taiwan
[3] Da Yeh Univ, Dept Mech Engn, Changhua 515, Taiwan
关键词
agglomeration; magnetic fluids; magnetic moment;
D O I
10.1016/S0304-8853(00)00827-1
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this work, the influence of the sweep rates of applied magnetic fields on the agglomeration of magnetic particles in the magnetic fluid film are reported. It was observed that a smaller column agglomerated by magnetic particles results at a higher sweep rate as compared with that at a lower sweep rate. Besides, the magnetic moment per volume inside a column decreases rapidly when the sweep rate is raised from 0 to 15 Oe/s, and almost remains constant as the sweep rate exceeds 20 Oe/s. This variation implies that the packing of magnetic particles inside a column depends on the sweep rate. Thus, the sweep rate is a crucial variable determining the internal structure of columns. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:1884 / 1886
页数:3
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