Magnetism of matters refer to the magnetism which merely correlate with composition and microstructure but not with shape and dimension of the matter. Magnetism of matters, otherwise known as intrinsic magnetic properties, is generally specified by remanence Br, coercivity Hcb, intrinsic coercivity Hcj, and energy products (BH)max. Magnetism of objects is a magnetism which influenced by intrinsic magnetic properties, shape, and dimension of the objects. Magnetism of objects are commonly obtaining more attention from customers in actual use. In addition, magnetism of objects is naturally more apt to the sampling inspection of magnetic properties in comparison with the magnetism of matters. Magnetism of objects, also known as the comparative measurement of magnetic properties. The frequently-used comparative measurement of magnetic properties includes surface gauss (magnetic field strength), magnetic moment, magnetic flux density, and pull force.
For magnetic material with straight line demagnetization characteristic like ferrite magnets, Samarium Cobalt magnets, and Neodymium magnets, their surface gauss, magnetic moment, and pull force can be approximately or roughly calculated by relevant calculation formulas and experience. It should be noted that SDM magnetic calculator unfit for AlNiCo magnet. Besides, results calculated by magnetic calculator are intended only for reference.
