According to the research results provided, the magnet with the strongest power in the world at the moment is a neodymium magnet (also known as a neodymium iron boron magnet). These magnets are mainly made of neodymium, iron, and boron, and through a specific process, the grain direction inside the magnet is uniform, so as to form a strong magnetic force.
The reason why neodymium magnets have such a strong magnetic force is because of the action of the neodymium element in their crystal structure. The neodymium element can immobilize the iron atom and prevent the magnetic reversal of the atom, while the boron element can enhance the magnetic force by combining with the iron atom. In addition, the atomic configuration diagram in the neodymium magnet crystal shows the atomic distribution in the neodymium magnet crystal, which is arranged according to the ratio of 2 neodymium atoms, 14 iron atoms, and 1 boron atom,(Nd2Fe14B). which makes the neodymium magnet have very high coercivity and magnetic flux density.
However, neodymium magnets also have their limitations, such as no heat-resistant. In a high-temperature environment, the magnetic force of the neodymium magnet weakens. In order to solve this problem, the researchers improved the heat resistance of the magnet by adding “dysprosium” metal alloy. In addition, the heat resistance and coercivity of the magnet can also be improved to a certain extent by the miniaturization of grains and the improvement of the performance of the neodymium-rich phase.
