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Frequently Asked Questions

Neodymium Magnets

  • Isotropic/Anisotropic
  • Curie Temperature
  • Ferromagnetism
  • Temperature Resistances
  • Bonded vs Sintered Neodymium Magnets
  • Focused/Focusing/Shaped Field Magnets

Isotropic means a material has the same properties (mechanical, magnetic, and metallurgical properties) in all (x, y and z) directions.
Anisotropic means that a material has different properties in different directions. Sintered Neodymium magnets are anisotropic, and Bonded Neodymium magnets are isotropic.

Together, these two kinds of Neodymium magnets offer designers many different design options.

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Rare Earths- Members of the Lanthanide series, plus Yttrium and Scandium

  • Neodymium
  • Praseodymium
  • Dysprosium
  • Terbium
  • Lanthanum
  • Cerium
  • Holmium
  • HREE
  • LREE

Neodymium (Nd) is the element after which Neodymium magnets are named.

Production of Neodymium Magnets

  • Neodymium Magnet Process Flow Steps
  • Coatings and Electroplate of NdFeB magnets
  • Neodymium Magnet safety
  • Hydrogen Decrepitation
  • Jet Milling

Hydrogen Decrepitation is a process step used in the production of Neodymiummagnets to create extremely small grains in the material.

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Magnetism

  • Magnetic Field
  • Magnetic Flux
  • Loss of Magnetic Flux
  • Magnetic Domains
  • Saturation Magnetization
  • Remanent Magnetization, Br Definition
  • Demagnetization
  • What is Hysteresis?
  • Hysteresis Loop
  • BH Curve
  • Eddy Current
  • Eddy Current Loss
  • Coercivity
  • Coercive Force
  • Difference between Hcb and Hcj
  • Reluctance
  • Permeance Coefficient
  • What is ferromagnetic?
  • Energy Product
  • Flux Density
  • North Pole
  • Shear Force
  • Focusing Magnets

A hysteresis loop shows the relationship between the external magnetizing force and the induced magnetic flux density.

Competitive Magnets

  • Neodymium vs Ferrite magnets
  • Neodymium vs Samarium Cobalt magnets
  • Neodymium vs Alnico magnets

If efficiency, especially efficiency-per-unit volume is the deciding factor, designers often choose Neodymium magnets, which deliver up to 20 times the magnetic field per unit volume compared to ferrite magnets, greatly reducing system size and often causing a cascade effect of size reduction throughout the entire system.
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Units

  • Teslas
  • Unit of Magnetic Field
  • Gauss
  • kA/m

The unit of Tesla is signified by the capital letter "T". 1 Tesla is equal to 1KGs (Kilo Gauss) or 1000 Gauss.