The reason why neodymium iron boron undergoes demagnetization in high-temperature environments is determined by its physical structure. The reason why a general magnet can generate a magnetic field is because the electrons carried by the material itself rotate around the atoms in a certain direction, generating a certain magnetic field force, which in turn affects related affairs around it. However, there are certain temperature restrictions on the rotation of electrons around atoms in a given direction, and different magnetic materials can withstand different temperatures. In cases of excessive high temperature, electrons will deviate from their original orbits, causing chaos. At this time, the local magnetic field of the magnetic material will be disrupted, leading to demagnetization.

Generally speaking, the demagnetization temperature of neodymium iron boron depends on its specific composition, magnetic field strength, and heat treatment history. Normally, the demagnetization temperature range of neodymium iron boron is between 150 degrees Celsius (302 degrees Fahrenheit) and 300 degrees Celsius (572 degrees Fahrenheit). Within this temperature range, the magnetism of neodymium iron boron gradually decreases until it is completely lost.