We introduce some technical terms on magnetism in this page. Hope they are helpful for you.

Residual Induction (Br):
The magnetic induction remaining in a saturated magnetic material after the magnetizing field has been removed, also called Remanence. This value indicates the magnetic flux density output of this material without an external magnetic field.

Coercive Force (Hc):
It is the demagnetizing force, which bring the magnetic induction to zero again after the magnet has previously been brought to saturation. This value indicates the ability of magnet to keep its magnetic force unchanged.

Maximum Energy Product ( (BH)max ):
This value indicates the maximum internal energy in a magnet. It is generally used to describe how "strong" this permanent magnet is.

Maximum Operating Temperature:
It is the highest temperature that a magnet can be exposed to without a significant permanent decrease in magnetic strength.

Temperature Coefficient:
A factor that is used to calculate the decrease in magnetic flux corresponding to an increase in operating temperature. The loss in magnetic flux is recovered when the operating temperature is decreased.

Curie temperature:
The temperature at which the parallel alignment of elementary magnetic moments completely disappears, and the material loses all of its magnetic properties and is not magnetizable.

Magnetic Pole:
An area in a magnet where the magnet's field is most intense and the lines of flux are concentrated. Every magnet has a pair magnetic pole at least.

North Pole:
The north pole of a magnet is the one attracted to the magnetic north pole of the earth. This north-seeking pole is identified by the letter N. By accepted convention, the lines of flux travel from the north pole to the south pole.

South Pole:
The south pole of a magnet is the one attracted to the south pole of the earth. This south-seeking pole is identified by the letter S. By accepted convention, the lines of flux travel from the north pole to the south pole.

Anisotropic Magnet:
A magnet which can be more easily magnetized on one direction than another. Generally this results from techniques used by manufacturers during the production of magnet materials, and it increases the magnetic strength of the material. Sintered SmCo (Samarium-Cobalt) and Sintered NdFeB (Neodymium-Iron-Boron) magnets are all anisotropic. Alnico, Ferrite (Ceramic) and FeCrCo (Iron-chromium-Cobalt) magnets are available as either anisotropic or isotropic.

Isotropic Magnet:
A magnet whose magnetic properties are the same in any direction, and which can therefore be magnetized along any axis or direction without loss of magnetic characteristics. See also Anisotropic Magnet.