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Glossary of magnet terminology

Anisotropic Magnet
Anisotropic Magnet
A magnet having a preferred direction of magnetic orientation.

Coercive force, Hc
The demagnetising force, measured in Oersteds necessary to reduce the induction, B to zero after a magnet has been previously saturated.

Temperature

Curie temperature, Tc
The transition temperature above which a material loses its magnetic properties.

Flux
The condition existing in a material subjected to magnetising force. The unit of flux is the Maxwell.

Gauss
Lines of magnetic flux per square centimeter. This is a measure of flux density.

Induction, B
The magnetic flux per unit area of a section normal to the direction of flux. This is measured in Gauss.

Intrinsic Coercive Force, Hci
This is a measure of a materials ability to resist demagnetisation. This is measured in Oersteds.

Irreversible Loss
This is defined as the partial demagnetising of a magnet caused by external factors.

Isotropic Magnet
A magnet material whose magnetic properties are the same in any direction.

Magnetic Field Strength, H
A measurement of the magnetic ability to induce a magnetic field at a given point. This is measured in Oersteds.

Magnetic Flux
The total magnetic induction over a certain area.

Magnetizing Force, H
The magnetomotive force per unit length at any point in the magnetic circuit. this is measured in Oersteds.

Points

Magnetomotive Force, F
The magnetic potential difference between any two points.

Maxwell
A unit of magnetic flux. One Maxwell is one line of magnetic flux.

Oersted, Oe
A unit of magnetic field strength or magnetizing force.

Orientation Direction
The direction in which an anisotropic magnet should be magnetised in order to optimize the magnetic properties.

Compass

Saturation
This is a condition where all magnetic moments have become oriented in one direction.

Stabilization
Exposing a magnet to demagnetising influences which are expected in the application in order to prevent irreversible loss during the operation of the magnet.