Rare earth magnets are unique magnets, first created in the 1970s. These magnets are composed of rare metals. On the periodic table rare metals is a group of seventeen rare elements know to human kind. Materials such as scandium and yttrium are rare elements, however despite the name, these elements are actually quite abundant in the earth’s crust. These magnets areconsidered to be the strongest permanent magnets. They are much more powerful then the common magnet, alnico and ferrite. Rare earth magnets are capable of producing a magnetic field more powerful then 1.4 Tesla, while common magnets merely produce a field of 1 tesla or less. High magnetic anisotropy is the primary source of the rare earth magnet’s strength. Simply put high anisotropy basically means that the crystals inside the magnet are easily magnetized in a single direction, however the crystals are not easily magnetized in other directions. Also, rare earth magnets posses high coercivity, which generally means they possess a better resistance to the lost of magnetic properties. Yet, magnets are vulnerable to rust and are quite brittle. They are usually reinforced with some form of plating or coating to prevent them from getting chipped or damaged in any other way. If you desire to buy rare earth magnets, take note that such magnets are often a good deal more expensive then common magnets. Buy Rare Earth Magnets.
There are two rare earth magnet types, which are the neodymium and samarium cobalt magnet. The samarium-cobalt was invented during the 1970s, and are far more weaker then the neodymium magnet. Samarium-cobalt magnets are also considerably more costly. However, an advantage the samarium-cobalt has is that it has a higher Curie temperature, which basically means the magnet is capable of enduring high temperatures without losing its magnetism. On the other hand, the neodymium magnet, made from boron, iron, and neodymium, is used a good deal more.
These magnets are not usually used as refrigerator magnets or any other way consumers typically use ferrite and alnico magnets. Because of the strength of these magnets they are mainly used as parts of various appliances. For instance, an industrial use of these magnets is in the hard drives of computers. Rare earth magnets are also found in various tools and devices such as headphones, speakers, mag-lev trains, and cordless tools. Due to recent decreases of prices, rare earth magnets have become increasingly popular among consumers. These magnets are great for household uses such as erasing video tapes, looking for hidden nails under flooring, re-magnetizing alnico magnets that have lost its magnetic power, or attaching tarps to automobiles.
The ideal way to purchase rare earth magnets is to research and shop online. Inserting keywords such as “magnet prices” or “buy magnets” into a search engine like Google or Bing will help you find the right sites. It is recommended to surf a large number of websites before deciding on a product. This will give you a better perspective on the various prices and products. Also, verify that the site offers a reasonable return policy, and do not have any additional hidden fees such as handling or shipping costs.