Physics for Information Science: Unit III: Magnetic Properties of Materials
Energy Product
Magnetic Properties of Materials
Hard magnetic materials have high magnetisation, retentivity and coercivity. The shape of the hysterisis loop in the second quadrant gives the effectiveness of permanent magnetism in the specimen.
ENERGY
PRODUCT
Hard
magnetic materials have high magnetisation, retentivity and coercivity. The
shape of the hysterisis loop in the second quadrant gives the effectiveness of
permanent magnetism in the specimen.
Therefore,
a product of retentivity (Mr) and coercivity (Hc) is made
and this product is called energy product, which gives the maximum amount of
energy stored in the specimen.
The
energy product curve is as shown in Fig. 3.27. Here two curves (i.e.,) (i) 1st
quadrant of the plot between energy product (MrHc) and Mr
which represents magnetisation and (ii) 2nd quadrant of M-H curve which
represents the demagneti- sation are joined together to from a single curve.
Thus from the energy product curve, maximum value of energy stored (MrHc)
in the specimen can be obtained.
Physics for Information Science: Unit III: Magnetic Properties of Materials : Tag: : Magnetic Properties of Materials - Energy Product
Physics for Information Science: Unit III: Magnetic Properties of Materials
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Physics for Information Science
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