ε-Fe_3N磁性液体二阶磁浮力实验研究

The Experimental Research on the Second-Order Buoyancy of ε-Fe_3N-based Ferrofluid

磁性液体的二阶磁悬浮原理是一个新颖的磁学实验,将它引入物理实验中,提升为设计性研究性实验项目,培养学生的创新思维和科学素养。使用圆片状钕铁硼永磁体作为实验材料,利用自行设计的非磁性浮子,研究了永磁体在磁性液体中的悬浮高度和二阶磁浮力。研究发现,永磁体厚度相同时,随永磁体直径增加,永磁体的悬浮高度逐渐变高,说明磁性液体对永磁体的二阶磁浮力增大,主要是由于随永磁体直径增加,其磁性增强所致,实验结果与理论研究一致。永磁体直径相同时,随永磁体厚度增加,磁性液体对永磁体的二阶磁浮力逐渐增大,导致永磁体的悬浮高度也逐渐增高。

The second-order magnetic levitation principle of magnetic liquid is a novel magnetic experiment.Hence,introduce it into the physics experiment and ascend into the design research experiment project,cultivate the innovative thinking and scientific literacy of the students.The suspension height and second-order magnetic buoyancy of permanent magnet in magnetic liquid are studied by using the nonmagnetic float designed by the self-designed non-magnetic float.Phase at the same time,the study found that the permanent magnet thickness with permanent magnet diameter increases,the suspension height of the permanent magnet get higher,that of second-order magnetic force of permanent magnet magnetic liquid,with permanent magnet is mainly due to the increase in diameter,its magnetic enhancement,the experimental results are consistent with theoretical research.As the diameter of the permanent magnet increases with the thickness of the permanent magnet,the second-order magnetic buoyancy of the magnetic fluid increases gradually,causing the suspension height of the permanent magnet to increase gradually.