Magnets considered a rare earth, and now the strongest magnet in the magnet, the most stable and best performance permanent magnet is the third generation of rare earth permanent magnet NdFeB. What is permanent magnet? This type of material, after being magnetized by an external, uncontrollable magnetic field, does not disappear magnetically. Instead, they can still provide a stable magnetic field to the site outside their own area.
Commonly used iron-boron magnets in the measurement of four commonly used indicators, today to introduce two of them
Units: Tesla (T) and Gaussian (Gs) 1Gs = 0.0001T
Definition: A magnet in a closed-circuit environment is magnetized by an external magnetic field to cancel the external magnetic field saturation, the magnetic induction of the performance of the magnet we call the remanence. It represents the maximum flux that the magnet can provide. It can be seen from the demagnetization curve that it corresponds to the situation when the air gap is zero, so the magnetic induction of the magnets in the actual magnetic circuit is less than the remanence. NdFeB is Br's highest practical permanent magnet material found today.
Magnetic coercivity (Hcb)
Units: A / m and Oe or 1 Oe ≈ 79.6 A / m
Definition: The value of the inverse magnetic field strength required to demagnetize the magnetically induced magnetism to zero after a magnetically saturated magnet is referred to as the magnetocentric coercivity (Hcb). However, the magnetization of the magnet is not zero at this time, but the applied reverse magnetic field and the magnetization of the magnet cancel each other out. (External magnetic induction intensity is zero) At this time if the withdrawal of the external magnetic field, the magnet still has some magnetic properties. The coercivity of NdFeB is generally 11000Oe or more.