The influence of the concentration of ferroparticles in a ferrofluid on its magnetic and acoustic properties

被引：23

作者：

Skumiel, A ^{[1
]}

Jozefczak, A ^{[1
]}

Hornowski, T ^{[1
]}

Labowski, M ^{[1
]}

机构：

[1] Adam Mickiewicz Univ, Inst Acoust, PL-61614 Poznan, Poland

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2003年 / 36卷 / 24期

关键词：

D O I：

10.1088/0022-3727/36/24/005

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This paper reports results of a study of magnetic and acoustic properties of a ferrofluid, EMG-605. The measurements were performed for three samples of the same ferrofluid differing in concentration. The magnetic susceptibility was measured as a function of an external magnetic field for each sample, which allowed us to determine the magnetization curves and saturation magnetization. The results provide information on the mean magnetic moment and the mean radius of the magnetic grain. In the samples subjected to an external magnetic field, the anisotropy of the ultrasonic wave absorption coefficient was determined. The mechanisms of ultrasonic wave energy dissipation through the translational and rotational degrees of freedom were established for some ferrofluid concentrations.

引用

页码：3120 / 3124

页数：5

共 14 条

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Blums E., 1997, MAGNETIC FLUIDS

[2]

CHUNG DY, 1978, J APPL PHYS, V49, P1809, DOI 10.1063/1.324819

[3]

de Gennes P. G., 1975, PHYS LIQUID CRYSTALS

[4] ULTRASONIC ATTENUATIONS IN MAGNETIC FLUIDS [J].