Will the magnet demagnetize due to heat after being energized?

Permanent magnets are also called hard magnets. Generally, they will not lose their magnetism so easily, and they will not be magnetized so easily. However, magnets have a high temperature resistant Curie temperature. If they are located in a reverse high magnetic field environment strength, Its magnetism will decrease or disappear. Even some magnets are brittle and may break directly in a high temperature environment.

We need to be clear that if you magnetize a magnet, you are also electrifying the magnet. Putting a ferromagnetic substance or a soft magnetic rod in the electrified solenoid will increase its magnetic field strength. If the electromagnetic direction after electrification is opposite, the magnet will The magnetic force will be weakened, but if the direction is the same, the magnetic force will be strengthened. Generally, when the current is not large, the magnet will generate a circular magnetic field when the current is not large. Influence. But if it is alternating current, then the magnet will generate eddy current, because the alternating current forms an alternating magnetic field.