Is the magnetic strength of a Disc Magnet With Hole affected by environmental factors such as temperature or humidity?

The magnetic strength of a Disc Magnet With Hole is indeed affected by environmental factors such as temperature or humidity, and there is a close relationship between the magnetic strength of a magnetic material and temperature. As the temperature rises, the thermal motion of atoms inside the magnet intensifies, which destroys the magnetic structure of the magnetic material and causes changes in the arrangement of magnetic domains (i.e., small magnetized areas inside the magnetic material). This change weakens the interaction between the domains, thereby reducing the net magnetism, i.e., the magnetic strength of the magnet will decrease.
Each magnetic material has a specific Curie temperature, which is the temperature at which the material can change between a ferromagnet and a paramagnet. When the temperature is below the Curie temperature, the material behaves as a ferromagnet, has strong magnetism, and the magnetic field is difficult to change. When the temperature is above the Curie temperature, the material transforms into a paramagnet, the magnetism is greatly weakened, and the magnetic field easily changes with the surrounding magnetic field. For a Disc Magnet With Hole, if the working environment temperature exceeds the Curie temperature of its material, the magnet will lose its magnetism and can no longer play an adsorption role.
Humidity is another important factor that affects the performance of magnets. In a humid environment, the surface of the magnet easily absorbs moisture, leading to oxidation and corrosion. Oxidation and corrosion can destroy the magnetic layer on the surface of the magnet and reduce the magnetic force. Especially when there are tiny defects or scratches on the surface of the magnet, moisture is more likely to penetrate and accelerate the corrosion process. Long-term oxidation and corrosion will not only weaken the magnetic force, but may also cause rust and peeling on the surface of the magnet, further affecting the service life and performance of the magnet.
Excessive humidity can also cause magnetic materials to be easily magnetized, forming hysteresis. Hysteresis refers to the phenomenon that the magnetization intensity lags behind the magnetic field intensity during the magnetization process of magnetic materials. Hysteresis can cause delays or incomplete release of magnets when adsorbing and releasing ferromagnetic materials, thereby affecting the stability of the magnetic force. Hysteresis can cause serious problems in application scenarios that require precise control of magnetic force or rapid response.