News & Events
What method can be used for demagnetization
Time： 2023-03-17
The simple way to eliminate the magnetism of a magnet (including a powerful magnet) is to bake the magnet on fire for a few minutes, and once it cools down, it has already lost its magnetism.
The reason why a magnet has magnetism is because the iron atoms in the magnet are arranged in a regular manner. After it is heated, the original arrangement of iron atoms becomes disordered, thus losing their original magnetism.
Introduction to Magnets:
The composition of a magnet is composed of atoms such as iron, cobalt, and nickel, and its internal structure is relatively unique, with inherent magnetic moments.
Magnet type:
1. Shape type magnets: square magnets, tile magnets, irregular magnets, cylindrical magnets, ring magnets, disc magnets, magnetic rod magnets, magnetic frame magnets;
2. Attribute magnets: samarium cobalt magnets, neodymium iron boron magnets, ferrite magnets, aluminum nickel cobalt magnets, iron chromium cobalt magnets;
3. Industry type magnets: magnetic components, motor magnets, rubber magnets, strong magnets, plastic magnets, and other types.
Magnets are divided into permanent magnets and soft magnets. The permanent magnets are added with strong magnets, so that the spin of magnetic materials and the electronic angular momentum are arranged in a fixed direction. The soft magnets are added with electricity. (It is also a method of adding magnetic force) When the current is removed from the soft iron, it will gradually lose its magnetism.
Magnets can generate magnetic fields and have the characteristic of attracting ferromagnetic substances such as iron, nickel, cobalt, and other metals.
Hang the midpoint of the bar magnet with a thin line. When stationary, its two ends will point towards the south and north of the Earth. The end pointing north is called the North Pole or N Pole, and the end pointing south is called the Guide Pole or S Pole.
If we imagine the earth as a big magnet, then the North Magnetic Pole of the earth refers to the south pole, and the geomagnetic south pole refers to the north pole. Between magnets, the homonymous magnetic poles repel each other and the heteronymous magnetic poles attract each other. So, the compass repels the South Pole, the North Pole repels the North Pole, and the compass attracts the North Pole.
Related news
What are the differences between neodymium iron boron permanent magnets and samarium cobalt?
The difference between neodymium iron boron permanent magnets and samarium cobalt - in terms of magnetism, neodymium iron boron magnets are known as the "magnetic king" in the industry, while samarium cobalt magnets have a lower magnetic strength compared to neodymium iron boron.
MORE