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TechTalk Category: Rare Earth Magnets

Thermal Cycling Effects on Rare Earth Permanent Magnets

Many times, we are asked about the effects of thermal cycling on rare earth permanent magnets, but there is not a simple rule of thumb to offer. From a first order standpoint, thermal cycling will degrade the performance of rare earth Neodymium Iron Boron and Samarium Cobalt magnets. There are two primary mechanisms which drive this degradation. One occurs quickly, and the second occurs over a long period of time…

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Why are Samarium Cobalt and Neodymium Magnets Called “Rare Earth” Magnets?

There are seventeen rare earth elements– fifteen of which are lanthanides and two of which are transition metals, yttrium and scandium, that are found with lanthanides and are chemically similar. In general, rare earth elements were given their name for two different, yet significant reasons.

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Selecting A Rare Earth Magnet

The term rare earth magnet is a generic name used to describe two types of magnetic material:  samarium cobalt and neodymium iron boron.  Both of these magnetic alloys utilize rare earth elements as the magnetic constituents and the characteristics offered by both material types lend themselves to specific applications.

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Did You Know?

Alnico has the highest operating temperature of all magnet materials (up to 930°F/500°C.)

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