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利用自行研制的磁性液体,搭建磁性液体界面不稳定性的实验装置,通过调控电磁铁的励磁电流产生不同的磁场,研究处于磁场中磁性液体界面不稳定性的现象,观察、检测磁性液体突起三维尖峰的数目、间距、高度随磁场的变化规律。实验结果表明,磁性液体处于磁场条件下,界面出现的三维尖峰的数目与磁场强度成正比,三维尖峰的间距与磁场强度成反比,三维尖峰的高度在磁场强度增加的过程中存在最大区间。了解和掌握磁性液体场致界面不稳定性的规律,将对检测微弱磁场信号和进一步拓展纳米磁性液体的应用具有深远意义。
By using self-developed magnetic fluid, an experimental device for instability of magnetic fluid interface was set up. By controlling the magnetizing current of the magnet, different magnetic fields were generated to study the instability of the magnetic fluid in the magnetic field. The three- The number of spikes, spacing, height with the magnetic field changes. The experimental results show that the number of three-dimensional spikes appearing at the interface is in direct proportion to the strength of the magnetic field when the magnetic fluid is in the magnetic field. The spacing of the three-dimensional spikes is inversely proportional to the strength of the magnetic field and the height of the three-dimensional spike has the maximum interval during the increase of the magnetic field. Understanding and mastering the instability of the magnetic fluid field interface will have far-reaching significance for the detection of weak magnetic field signals and the further application of magnetic nano-fluid.