A rare-earth magnet alloy is a powerful magnet that was developed in the '70s. Remnant magnetism is an important factor to check when buying. Unlike ceramic or ferrite magnets, rare earth has strong power, up to 1.4 teslas.
Secondly, attention should be attentive to the coercively; resistance to demagnetization of the earth magnets when shopping for any magnet. In addition, the Curie temperature should also be assessed in order to maximize performance.
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The higher the remanence, the higher the coercively be low curie temperature create strong magnetic fields of other types available. Although they are referred to as 'rare earth', this magnet is found as abundant as lead or tin naturally.
Rare earth is fragile and vulnerable to corrosion; defects are corrected by layer so as to protect them against damage or chipping. The two main types are dominant in the market; neodymium and samarium-cobalt are largely varied by their curie temperature.
Neodymium is the strongest and most affordable type of magnets and reliable components in electric motors, computer hard drives and buckle jewelry manufacture. In addition, electric tools such as headphones, power steering systems for commercial vehicles in magnitude.
However, neodymium has a low Curie temperature and is more susceptible to oxidation than samarium-cobalt. On the other hand, samarium-cobalt created first and far more expensive and has a magnetic field that is weaker than neodymium.
Generally, a higher number indicates that a strong magnet. The figures come from an existing property in the material and are often expressed in Mega Gauss Oersteds, representing the strongest magnetic point on the demagnetization curve.