Properties of magnets

Most magnetic materials can be magnetized to saturation in the same direction, which is called the "magnetization direction" (orientation direction). Magnets without orientation (also called isotropic magnets) are much weaker than oriented magnets (also called anisotropic magnets). What is the standard "North Pole" industry definition? "North pole" is defined as the north pole of the magnet pointing to the earth's north pole after the magnet rotates at will. Likewise, the South Pole of a magnet points to Earth's South Pole. How can you tell the north pole of a magnet without a label? Apparently it's impossible to tell just by eye. A compass can be used to hold the magnet close, and a needle pointing to the Earth's North Pole will point to the magnet's South Pole. How to safely handle and store magnets? Always be very careful as the magnets will snap together and may pinch your fingers. There is also the possibility of damage to the magnet itself (knocking off corners or knocking cracks) due to collisions when the magnets are attracted to each other. Keep magnets away from items that are easily magnetized, such as floppy disks, credit cards, computer monitors, watches, mobile phones, medical devices, etc. Magnets should be kept away from the pacemaker. For larger size magnets, plastic or hard paper spacers should be added between each piece to ensure that the magnets can be easily separated. Magnets should be stored in a dry, constant temperature environment as much as possible. How to achieve magnetic isolation? Only materials that can be adsorbed to the magnet can play the role of isolating the magnetic field, and the thicker the material, the better the effect of magnetic isolation. What is the strongest magnet? At present, the highest performance magnets are rare earth magnets, and neodymium iron boron is the most powerful magnet among rare earth magnets. But in the environment above 200 degrees Celsius, samarium cobalt is the most powerful magnet.