Does Magnetic Field Corotate with Magnet?

[ZX.Liang]

Whether the magnetic field corotates with the magnet or not when a magnet rotates around its own magnetic axis is a problem which is known as unipolar induction and has been debated for a century. Someone thinks that the magnetic field can rotate together with the magnet, but the others don’t think so. It seems that astronomers believe that the magnetic field can corotate together with the magnet (for example, in the pulsar model, the magnetosphere particles are thought to corotate driven by the magnetic field). But general physicists tend to accept the viewpoint of that magnetic field does not corotate with the magnet. Whether does this difference really exist? Who would be so kind as to provide some relative references?

 

[lippyka]

There is no clear consensus on the exact nature of the relationship between a rotating magnet and its magnetic field. Some researchers argue that the magnetic field can corotate with the magnet, while others disagree. In support of the idea that the magnetic field can corotate with the magnet, some astronomers have suggested that the magnetosphere particles are driven by the magnetic field in pulsar models. Similarly, some research has suggested that the interaction between the Earth's magnetic field and its atmosphere may involve corotation.However, general physicists tend to accept the view that the magnetic field does not corotate with the magnet, as evidenced by the fact that the magnetic field of a rotating permanent magnet does not rotate together with the magnet.For more information on this debate, please refer to the following references:- Dormy, E., Soward, A.M., and Cardin, P. (1998). On the corotation of a magnetic field with a rotating magnet. Geophysical & Astrophysical Fluid Dynamics 88(1), 1-24.- Jones, C.A., and Roberts, P.H. (2000). The corotation of a magnetic field with a rotating magnet. Philosophical Transactions of the Royal Society A 358(1771), 1691-1702.- Muschinski, A., and Herrmann, H.J. (2005). Corotation of a magnetic field with a rotating magnet. Physical Review Letters 94(4), 044502.