The surface magnetic of neodymium magnet

     First of all, we need to learn the meaning of surface magnetism. "Surface Magnetic Field" refers to the strength of the magnetic field lines perpendicular to the surface of the object. In the presence of a magnetic field, a magnetic field distribution is formed on the surface of the object, which is composed of magnetic field lines. At each point, the direction of the field lines represents the direction of the magnetic field, and the density or distance of the field lines represents the strength of the magnetic field.

     Similarly, for powerful neodymium magnets, its surface magnetism refers to the magnetic field distribution near the surface of the neodymium magnet. Usually, the unit of Gauss (Gs) represents the surface magnetism intensity of a certain point on the surface of the permanent magnet.Generally, the surface magnetism of each point on the surface of a neodymium magnet is different. Normally, when we measure, we measure the two data: the surface magnetism of the center and the highest surface magnetism of the edge. Because the gaussmeters used in the factory are different and the internal sensing components are different, the magnetic field value we measure may be different from one manufacturer to another. Moreover, when measuring surface magnetism in different environments, the measurement results may be different.

     Many people are also curious about the relationship between the surface magnetism of neodymium magnets and the attraction of magnets. This issue will be briefly explained next.

     Ndfeb neodymium magnets usually have a strong magnetic field, so the surface magnetic area formed near the surface of the neodymium magnet is relatively strong. The stronger the surface magnetic area of ​neodymium magnets, the stronger its magnetic attraction will usually be. Due to the strong magnetic field intensity in the surface magnetic region, when other magnetic objects are close to the neodymium magnet, these objects will experience a greater attraction.

     Secondly, the distribution form of surface magnetism varies according to the shape and magnetic field configuration of the neodymium magnet. This problem actually needs to be divided into many situations. The first one: if there are two magnets of the same size and shape, the one with the larger surface magnetism will have greater magnetic force. The second type: two magnets with different shapes or sizes. Comparing the magnetic values ​​of the two magnets to judge the magnetic strength has no actual reference significance.

     The surface magnetic distribution of neodymium magnets is very important for some applications. For example, in fields such as magnetic clamping, sensors and motors, the surface magnetic distribution of neodymium magnets is crucial to ensure the stability and uniformity of the magnetic force. Therefore, during the manufacturing and application process of neodymium magnets,  it is usually necessary to measure the surface magnetism and evaluate it to ensure that it meets specific requirements.