Magnet Glossary

Isotropic magnet: The magnetic properties are the same in any direction.

Coercivity (Hcb): the strength of the reverse magnetic field required to reduce the B of a permanent magnet magnetized to technical saturation to zero.

Working Temperature: the temperature at which the magnet begins to lose its magnetism

Magnetic flux: A physical quantity, in weber, that represents the distribution of magnetic fields

Gauss: Flux lines per square centimeter, a measure of flux density

Intensity (B): A physical quantity describing the strength and direction of a magnetic field, measured with a Gauss meter.

Intrinsic Coercivity: a parameter used to measure the resistance of a magnet to demagnetization. The unit is Oster.

Irreversible loss: Partial demagnetization caused by external factors

Magnetic field strength: Magnetic force measured at a defined point.

Flux: The total intensity of magnetic induction over a defined area.

Direction of magnetization: Direction of magnetization refers to the direction of magnetization required by the anisotropic magnet in order to optimize its performance.

Saturation magnetization: The condition in which magnetic flux reaches a certain amount and cannot increase indefinitely.

Maximum magnetic energy product (BH) Max: Any point on the demagnetization curve B by H value, namely, Bm, Hm, and (BH) represents the magnet magnetic energy density in air gap space, namely the unit volume of air gap magnetostatic energy, because the energy is equal to the magnet Bm and the product of Hm, so-called magnetic energy product, the curve of magnetic energy product vary from B is called the magnetic energy curve, The product of Bd and Hd corresponding to one point has the maximum value, which is called the maximum magnetic energy product.

Remanent magnetism (Br): the residual magnetic induction intensity of the magnet after removing the magnetic field.

Gauss meter: a tool used to measure magnetic induction intensity.

Hysteresis loop: in a magnetic field, the relationship between the magnetic induction intensity of a ferromagnet and the magnetic field intensity can be expressed by a curve. When the magnetized magnetic field changes periodically, the relationship between the magnetic induction intensity in a ferromagnet and the magnetic field intensity is a closed line, which is called the hysteresis loop.

Pole: The characteristic of a permanent magnet at a particular position, distinguishing north (N) from the south (S).

Stability: less irreversible loss of magnet, greater stability.

Plating/coating: Neodymium magnets are mainly composed of neodymium, iron, and boron. Without plating, the iron in the magnet will rust. Most magnets are triple-plated nickel -- copper-nickel, but some are gold-plated, silver, or black nickel, we also have bulk neodymium magnets for sale coated with epoxy, plastic, or rubber.

Flux density: An alternate name for magnetic induction intensity, which indicates the number of magnetic lines of force passing vertically through a unit area, usually measured in Gauss (CGS).