GLOSSARY OF MAGNETIC TERMINOLOGY
Anisotropic (oriented) - The material has a preferred direction of magnetic orientation.
Coercive Force, Hc - The demagnetizing force, in oersteds, required to reduce the residual induction, Br, of a fully magnetized magnet to zero.
Curie Temperature - Temperature at which a material loses its magnetic properties.
Gauss - Unit of measure of magnetic induction, B, or flux density in the CGS system.
Gaussmeter - An instrument used to measure the instantaneous value of magnetic induction, B.
Intrinsic Coercive Force, Hci - Oersted measurement of the material¡¯s inherent ability to resist self-demagnetization.
Isotropic (non-oriented) - The material has no preferred direction of magnetic orientation, which allows magnetization in any direction.
Magnetic Induction, B - Flux per unit area of a section normal to the direction of the magnetic path. Measured in gauss.
Maximum Operating Temperature - The maximum temperature of exposure that a magnet can forego without significant long-range instability or structural changes.
North Pole - That magnetic pole which attracts the geographic North Pole.
Optimum Geometry Dia : Thk - Different magnet materials have different optimum shapes to use that magnetic material to get the most magnetism for the material mass. For example if you make a Neodymium magnet very thick you are getting less and les increase in strength as you increase the thickness. To get the most magnetism for your dollar Neodymium likes to have a diameter 10 times the thickness.
Permanence (Hci) - A magnetic material can be magnetized and de-magnetized easily if it has a low coercivity or Intrisic Coercive Force (Hci).
Residual Induction, Br - Flux density, measured in gauss, of a magnetic material after being fully magnetized in a closed circuit.
Strength MGOe, Maximum Energy Product, BHmax - The maximum product of energy (BdHd) which can be obtained on the demagnetization curve. The overall strength of a magnet material is measure in Mega Gauss Oersteds (MGOe) in the US. For example Neodymium Iron Boron rates from 27-50 MGOe.