Magnet Terminologies

Magnet Terminology – Glossary

-Understanding Different Magnet Terminologies from Dailymag.

Air Gap – it refers to the external distance from one pole to another through a non-magnetic material.

Anisotropic – is comprised of a variety of properties in a wide range of directions. The most common anisotropic magnet is neodymium.

B/H Curve – It is the magnetic field (H) value plotting result that is applied against flux density resultant (B). The achieved curve determines the magnetic material qualities.

Maximum Energy Product BHmax – It is the point in the B/H curve that possessed the most strength. It is commonly expressed in MegaGaussOesterds (MGOe).

Brmax (Residual Induction) – It is commonly known as residual flux density. After the magnetizing field, the remained magnetic induction in a saturated material is removed. At this point, the hysteresis loop crosses the B axis at the magnetizing force of 0. It commonly occurs at the zero air gap.

C.G.S. – It is short for centimeter, gram, and second in the measurement system.

Coercive Force (Hc) – It refers to the demagnetizing force that is important in reducing the observed induction after the magnet is brought to saturation.  It is commonly measured in Oersteds.

Curie Temperature Tmax – A magnet losses all its magnetic properties at this temperature.

Demagnetization Force – It is a magnetizing force in which the direction is opposite to the force used to magnetize. The demagnetizing forces include temperature and vibration.

Demagnetization Curve – This refers to the hysteresis loop’s quadrant that describes the magnetic characteristics behavior when actually used. It is also known as the B-H curve.

Dimensions – It is the magnet’s physical size including its coating or plating.

Dimensional Tolerance – It is a permissible range of allowance of the finished magnet’s nominal dimensions.

Dipole Moment (M) – It is a quantity that describes the external magnetic field experience.

Electromagnet – These magnets are consists of iron core and solenoid. It only has a magnetic field during the current flow in a solenoid.

Ferromagnetic Material – these materials are the source or conductor of magnetic flux. Ferromagnetic materials are composed of cobalt, nickel, or iron.

Gauss – It refers to the magnetic Induction (B) unit.

Gauss Meter – It is an instrument that is commonly used for measuring the magnetic induction (B) instantaneous value. Is also referred to as a DC magnetometer.

Gilbert – In the C.G.S system, it refers to the magnetomotive force (F).

Hysteresis Loop – It is a plot of the B/H curve in which the material is successively magnetized in the opposite direction, demagnetized, and magnetized to saturation. The loop’s size and shape are necessary for soft and hard materials.

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