Rare-earth magnet

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A rare-earth magnet is a strong permanent magnet made from alloys of rare earth elements, or lanthanide and actinide metals, with other metals. They are substantially stronger than ferrite or alnico magnets.

The magnetic field produced by rare-earth magnets can be well over 1.2 teslas. By comparison, ferrite or ceramic magnets typically exhibit around 50 to 100 milliteslas. Common applications of rare-earth magnets include computer hard drives and high-end speakers. Some other applications of rare-earth magnets include experiments with diamagnetic levitation, the study of magnetic field dynamics, superconductor levitation as well as countless other applications.

Contents

1 Types of rare-earth magnets

2 External links

Types of rare-earth magnets

The most powerful and affordable type of rare-earth magnet is a neodymium magnet. Neodymium magnets are made of neodymium, iron and boron in the formula Nd₂Fe₁₄B. These magnets are found in almost every computer hard drive as well as in various types of speakers.

Samarium-cobalt magnets (Sm Co₅) are less common than neodymium magnets because they are more expensive and not as strong. These magnets are generally used in high temperature applications since they have a higher Curie point.

External links

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Rare-earth magnet

Types of rare-earth magnets

The most powerful and affordable type of rare-earth magnet is a neodymium magnet. Neodymium magnets are made of neodymium, iron and boron in the formula Nd2Fe14B. These magnets are found in almost every computer hard drive as well as in various types of speakers.

Samarium-cobalt magnets (SmCo5) are less common than neodymium magnets because they are more expensive and not as strong. These magnets are generally used in high temperature applications since they have a higher Curie point.

External links

The most powerful and affordable type of rare-earth magnet is a neodymium magnet. Neodymium magnets are made of neodymium, iron and boron in the formula Nd₂Fe₁₄B. These magnets are found in almost every computer hard drive as well as in various types of speakers.

Samarium-cobalt magnets (Sm Co₅) are less common than neodymium magnets because they are more expensive and not as strong. These magnets are generally used in high temperature applications since they have a higher Curie point.