4. Rare earth alloys

The appearance of these metal alloys around the 1960s represented a huge advance in the field of permanent magnets, thanks to their magnetic properties. Compared with other existing magnets, rare-earth magnets have a very high volumetric energy density and high resistance to demagnetization.

This family includes :

samarium-cobalt magnets ;
neodymium-iron-boron magnets.

4.1 Samarium-cobalt alloys

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4.1.1 Material...

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Rare earth alloys

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Statistical and economic data

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Also in our database

LECHEVALLIER (L.), LE BRETON (J.-M.), TENAUD (P.), MOREL (A.), BRASSARD (S.) - Aimants permanents – Applications et perspectives. -

Bibliography

(1) - ROSSIGNOL (M.), YONNET (J.P.) - Les aimants permanents. Les matériaux magnétiques et leurs applications : Magnétisme II. - Presses Universitaires de Grenoble (1999).
(2) - - Notes d'applications TDK, Ferrites, NdFeB, SmCo (2005) disponible...

Standardization

Magnetic materials – Method for measuring the coercive field of magnetic materials in an open magnetic circuit (classification index: C28-921) - NF EN 10330 - 08-03
Magnetic materials – Materials for permanent magnets (magnetically hard) – Methods for measuring magnetic properties (Classification index: C28-919) - NF EN 10332 - 03-04
Quantities and units – General principles. - NF X02-001 - 12-93
Basic...