
Hardness: HRB A measure of the resistance of a material to surface indentation or abrasion.
Anisotropic: (a.k.a Magnetically Oriented) The material has a predefined direction of magnetic orientation
Coercive Force: H_{cb} The magnetic field H which must be applied to a magnetic material in a symmetrical, cyclicly magnetized fashion, to make the magnetic induction B vanish.
Curie Temperature: T_{C} Temperature at which a material loses its magnetic properties.
Gauss: G Unit of magnetic induction in the electromagnetic and Gaussian systems of units, equal to 1 maxwell per square centimeter.
Intrinsic Coercive Force: H_{cj} A measure of the material inherent ability to resist demagnetization.
Isotropic: A magnet material whose magnetic properties are the same in any direction, and which can therefore be magnetized in any direction without loss of magnetic characteristics.
Magnetic Flux: The total magnetic induction over a given area. When the magnetic induction, B, is uniformly distributed over an area A, Magnetic Flux = BA.
Magnetic Induction: B (a.k.a Magnetic Flux Density) Flux per unit area of a section normal to the direction of the magnetic path. Measured in gauss.
Maximum Energy Product: BH_{max} The point on the Demagnetization Curve where the product of B and H is a maximum and the required volume of magnet material required to project a given energy into its surroundings is a minimum.
Maximum Operating Temperature: T_{max} The maximum temperature of exposure that a magnet can forego without significant longrange instability or structural changes.
Recoil Permeability: µ_{r} The ratio of change in flux density as a function of incremental change in applied field (H) in the vicinity of H=0. It has no dimensions in either the MKSA or CGS system.
Residual Induction: B_{r} (a.k.a residual flux density; residual magnetic induction; residual magnetism) The magnetic flux density at which the magnetizing force is zero when the material is in a symmetrically and cyclically magnetized condition.
Temperature Coefficient: The rate of change in magnetic property with respect to temperature. Expressed as percent change per unit of temperature.



