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Do you know neodymium magnet and its specialty?
Neodymium magnets' chemical formula is Nd2Fe14B, and is a kind of artificial permanent magnet. It is, by far, the most magnetic permanent magnet. It is called a magnetic king with a very high magnetic property. The maximum energy product is 10 times higher than ferrite. Its mechanical property is also quite good.
The maximum working temperature can reach 200 degrees Celsius. And because of its hard texture, stable performance and good price, its application is extremely extensive. But because its chemical activity is very strong, so their surface must be with coatings processing. In many areas, it has the potential to replace traditional ferrite magnets, alnico, SmCo magnet. The neodymium magnets with strong magnetism are widely used in electronic products, such as a hard disk, mobile phone, headphones and so on.
from：http://www.htmagnets.com/newsd-nid-12.html-
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