Rare Earth Magnets

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Rare Earth Magnets

An Advanced Group of Magnetic Materials

Integrated Magnetics carries a large inventory of licensed, rare-earth magnetic materials. Magnetic properties for rare-earth magnet materials far exceed those of ceramic or alnico materials, making them the preferred magnetic material for many technical applications. Available in off-the-shelf standard sizes, shapes and grades, or in build-to-print custom configurations.

Integrated Magnetics designs and builds custom rare-earth magnets and magnetic assemblies, manufactured to meet your specialty requirements. Request for quote or contact us for more information about our standard and custom rare-earth magnets.

We also offer a wide variety of neodymium and samarium cobalt magnets, available for on-line purchase at MagnetShop.com.

Custom Neodymium Iron Boron Magnets 

The Most Powerful Class of Magnetic Materials Available Today 

Neodymium Iron Boron (NdFeB) magnets are part of the Rare Earth magnet family, and are extremely powerful and versatile. Components that previously had to be large and heavy can now be miniaturized by using these materials. This often results in a substantial cost savings for the completed assembly. High in strength and less brittle, but more temperature sensitive than the SmCo types of Rare Earth magnets, neodymium magnets are often the more cost effective choice. 
  • Sizes & Shapes: Sizes range from micro-dimensions (0.010") to assemblies weighing several tons. Standard shapes include discs, blocks, rings, and arc segments in different grades. Non-standard shapes can be custom fabricated to specifications from raw stock. 
  • Manufacturing: Due to the relatively brittle nature and high magnetic strength of NdFeB magnets, cutting and grinding should be done prior to magnetization. Integrated Magnetics can custom manufacture virtually any shape and size to meet your requirements, using our in-house grinding and EDM facilities. Finishing to tolerances of +0.0001" can be achieved, if required.
  • Surface Treatments: NdFeB magnets are susceptible to oxidation, so painting, epoxy coating, or plating is highly recommended to prevent corrosion.  We are able to coat these magnets with a wide variety of materials, most commonly nickel plating, IVD, or epoxy coatings.
  • Temperature Considerations: Neodymium magnets are temperature sensitive. For applications in which the magnet may be exposed to temperatures in excess of about 250⁰ (120⁰C), careful consideration must be given to the choice of magnet grade and the magnetic circuit.
  • Magnetizing & Handling: Sintered neodymium magnets are anisotropic and have a strongly preferred magnetic orientation, while isotropic bonded NdFeB materials, though weaker, can be magnetized in any direction, or with multiple poles. Special magnetizing fixtures are required in order to achieve multiple pole magnetization. Magnetizing fields in excess of 35 kilo Oersteds are required to magnetize these materials. NdFeB materials are mechanically weak, but are magnetically very strong. They must therefore be handled carefully to avoid injury to personnel and damage to the magnets. 
  • Common Applications: Holding systems requiring very high holding forces, high field yoke magnets, magnetic bearings, magnetic couplings, loudspeakers, Halbach arrays, headphones, microphones, magnetic separation, instrumentation, switches, relays, magnetic resonance, sputtering, vacuum deposition, charged particle beam guidance, particle accelerators, undulators, wigglers, high performance stepper, DC, servo, linear, voice coil motors, and more. 
 

Custom Samarium Cobalt Magnets 

High Performance Magnets Offering Excellent Temperature Stability

Samarium Cobalt magnets (or SmCo magnets), also part of the rare-earth family. These high-performance magnets are extremely powerful and available in different grades that span a range of properties and application requirements. SmCo magnets have a very high resistance to demagnetization and to corrosion. They exhibit excellent temperature stability, and can operate at temperatures up to 525 F°(300°C). 
  • Sizes & Shapes: Standard shapes include discs, blocks, rings and arc segments in a variety of sizes and grades. Non-standard shapes can be custom fabricated to blueprint specifications from raw stock. We can custom manufacture samarium cobalt magnets in virtually any shape & size to meet your requirements.
  • Manufacturing: SmCo magnets are extremely brittle, and prone to chipping and cracking. Special machining techniques, involving diamond-grinding techniques, must be used to machine this material prior to magnetization. We are fully equipped to machine SmCo materials to your specifications.
  • Surface Treatments: The corrosion resistance of SmCo is very good, therefore coatings for corrosion resistance are generally not required.
  • Temperature Considerations: SmCo magnets exhibit magnetic properties that are very stable with temperature, and may be used in applications where temperatures may reach 572⁰F(300⁰C). SmCo magnets perform very well where the stability of magnetic characteristics is critical. 
  • Magnetizing & Handling: SmCo magnets are anisotropic, and can only be magnetized in the orientation direction. Magnetizing fields in excess of 50 kOe are required to saturate these materials (more for SmCo 2:17). SmCo materials are mechanically very weak, but magnetically very strong. Therefore, they must be handled very carefully to avoid injury to personnel and damage to the magnets.
  • Common Applications: Holding systems requiring very high holding forces, high field yoke magnets, magnetic bearings, magnetic couplings, loudspeakers, Halbach arrays, headphones, microphones, magnetic separation, instrumentation, switches, relays, magnetic resonance, sputtering, vacuum deposition, charged particle beam guidance, particle accelerators, undulators, wigglers, high performance stepper, DC, servo, linear, voice coil motors, and more.   
  • Magnet Materials: For more detailed material information & data sheets, view our SmCo magnet materials page.
 
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