Magnetic Jewelry Clasp

Any material or object that produces its own magnetic field is identified as a magnet. There are different types of magnets with varying properties. Permanent magnets create their own uninterrupted magnetic field, like that of a refrigerator magnet that remains constantly magnetized to stay on the surface of the refrigerator. Ferromagnetic and ferrimagnetic materials are those that produce a permanent magnetic field and attract other magnets. In other words, these are materials that have the ability to be magnetized, like iron and nickel for example. An electromagnet consists of a wire coil, often wrapped around a ferromagnetic material that becomes magnetized by an electric current. Neodymium magnets are a very strong type of permanent magnet.

All permanent magnets are formed by either ferromagnetic or ferrimagnetic materials. A material is considered as ferromagnetic if all of its magnetic ions make a positive contribution to the magnetization of that material. However, if some of the magnetic ions subtract from the magnetization, then the material is identified as ferrimagnetic. The refrigerator magnets previously mentioned are made of ferromagnetic materials.

Neodymium magnets are composed of a boron, iron, and neodymium alloy to form the strongest currently known type of permanent magnet. Frequently, they are called rare Earth magnets because these elements are usually found in very small quantities. These magnets are quite affordable nowadays due to a steady decrease in price since their first construction and for this reason they are often used in the production of many new technologies. Examples of such widely used technologies include computer hard drives, speakers and headphones, cordless tool motors, roller coasters, children?s building toys, and many others. Neodymium Rare Earth magnets are easily breakable and highly susceptible to oxidation and corrosion. For that reason, they are typically coated or plated with protective treatments. Epoxy resin, gold, nickel, tin, and zinc are frequently used to coat their surface and make them more resistant against corrosion. There are many manufacturers of these magnets and they can be found in various shapes and sizes for all kinds of uses.

Electromagnets are also commonly used. Because their magnetism is only active with the presence of electricity, they are very useful in things like generators, industrial heavy lifting machinery, loudspeakers, motors, MRI machines, and other scientific equipment so that the magnetic field can be terminated as necessary. An advantage that these magnets hold over permanent magnets is the ability to manipulate the strength of the field by controlling the amount of electricity that is fed to the device.

Magnets are used in all sorts of everyday products and activities, some more noticeable than others. Neodymium magnets are very strong, inexpensive, and easily obtained and are therefore a very popular type of magnet.

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