Permanent magnet Arnold Magnetic Technologies

NEODYMIUM MAGNETS
Sintered neodymium-iron-boron (NdFeB) magnets, also referred to as "neo" magnets, have been commercially available since November 1984. They offer the highest energy product of any material today and are available in a very wide range of shapes, sizes and grades. Earliest use of neo magnets was primarily for voice coil motors (VCM's) in hard disk drives and this market still accounts for about 55% of total sales dollars. Other applications include high performance motors, brushless DC motors, magnetic separation, magnetic resonance imaging, sensors and loudspeakers.

SAMARIUM COBALT MAGNETS
Samarium cobalt magnets were first commercially available about 1970. Two materials have been developed to-date: SmCo5 and Sm2Co17. These materials are stronger than ferrite and alnico magnets and became widely used in high output motors where weight and size are an issue. They were also introduced into sensor applications where temperature stability was of importance. While neodymium iron boron magnets have replaced samarium cobalt in many applications, samarium cobalt is still used where high temperature performance, excellent thermal stability or excellent corrosion resistance is required. They are available from the Swift Levick Magnets Division in arcs, rods, flats, blocks and many other custom shapes.

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