China Neodymium And Ferrite Magnets Manufacturer & Supplier 
In physics, a bar magnet is a typical type of permanent magnet. It is typically elongated in shape, with distinct magnetic poles at both ends—one end being the north pole (N) and the other the south pole (S). Bar magnets are commonly made from iron, cobalt, nickel, or their alloys, as well as rare earth elements such as neodymium and samarium. Through physical or chemical methods, the magnetic domains within the material are aligned uniformly, thereby generating a stable magnetic field.
Educational bar magnets, usually made of ferrite, related product columns have ferrite bar magnets.
Permanent magnets, as the name suggests, are magnetic materials that retain their magnetic properties even in the absence of an external magnetic field. Bar magnets are classified as permanent magnets because their magnetic properties originate from the atomic-level structure and arrangement of electron spins within the material. Once magnetized, this arrangement remains stable over the long term and does not easily lose its magnetic properties. The magnetic properties of bar magnets may only be damaged or weakened under extreme conditions such as high temperatures, strong vibrations, intense magnetic fields, or corrosive environments.
In physics research and education, bar magnets have extensive practical applications. They are not only used for demonstrating basic magnetic experiments such as the distribution of magnetic field lines and the effect of magnetic fields on iron filings but also serve as common tools for studying phenomena like electromagnetic induction and the Lorentz force. The magnetic field formed between its two poles is approximately uniform and linear, making experimental observations and data analysis simpler and more intuitive.
As a typical representative of permanent magnets, bar magnets are also widely used in daily life and industry. For example, magnetic building blocks in children's toys, magnetic closure devices on furniture cabinet doors, magnetic sensors in electronic devices, and even in the medical field.
Currently, commonly used bar magnet materials include Ndfeb, Ferrite, Alnico, and SmCo, all of which are permanent magnetic materials.
More knowledge about bar magnets;