The largest possible product obtained from B and H within the demagnetization curve. The higher the maximum (BH) value of a material is, the smaller the magnetic volume required for a certain task, in otherwise identical conditions, may be.
Intrinsic demagnetization curve & Intrinsic coercive field force:
The magnetic field of magnet results to the affection of the function of the outer magnetic field, which will be consumedly enhanced. This means the magnetic induction force will be increased. Please see (B)
Bi=B 0 +B 1
Bi is called intrinsic magnetic induction force. The curve Bi-H describing the relationship of intrinsic induction force and magnetic field force is called intrinsic demagnetization curve. The value of magnetic field force to cause the intrinsic magnetic induction force to zero is called intrinsic coercive field force.
Curie temperature:
The temperature at which a ferro-magnetic material loses its magnetism. Designated to Madame Curie.
Operation temperature:
The highest temperature a definite size magnet (normally ?10X7mm) can be exposed to in long time (1000hours), then cooled to the initial temperature, its irreversible loss of magnetization is less than 5% at open circuit.
Irreversible:
Means irreversible or impossible to repeat. In the case of an irreversible alteration e.g. caused by influences of temperature, the magnetic values do not revert to the original values if the original temperature is regained.
Reversible:
Reversible or recursive. A reversible conduct of temperature e.g. means that a magnet, after heating up and subsequent cooling down to its initial temperature, regains its initial value.
Temperature coefficient:
Indicates the alteration of remanence and coercive field force, depending on temperature, in magnetic materials.
