Neodymium magnets are strong permanent magnets made of rare earth element alloys. They are a type of rare earth magnet and are the most widely used rare earth magnets. They are also the strongest permanent magnets on the market.

　　Neodymium magnets lose their effective magnetic field very easily at high temperatures. New magnet grades should be carefully selected based on the operating temperature of the application and the geometry of the magnet. All magnet alloys gain or lose an effective magnetic field with fluctuations in temperature. As the temperature increases, the new magnet will lose its effective magnetic field and is said to have a negative temperature coefficient. The new magnets lose their magnetic field at a faster rate than other magnet alloy options. The new magnets effectively have a higher temperature coefficient (TC) than other commercial alloys.

　　This high rate of change relative to temperature exposure causes neodymium magnets to be very susceptible to demagnetization from elevated operating environments. Magnets may be exposed to temperatures that will not fully demagnetize but will degrade their magnetic properties so that they can no longer provide enough magnetic field to support the application.

　　The losses discussed so far are considered reversible. This means that the magnets will recover their losses after cooling. Magnet suppliers typically publish the Reversible Temperature Coefficient (RTC) of Residual Inductance (Br) and Intrinsic Coercive Force (Hci) for each specific grade of Neo. When selecting a new magnetic grade for applications above ambient room temperature, the RTC and recommended maximum operating temperature must be considered.

　　Ningbo MGT Magnetism Co.,Ltd is Block Neodymium Magnet Manufacturers, its main products are Round Neodymium Magnet, etc. Welcome to consult!