Electrical Engineering Material

1. ELECTRICAL ENGINEERING
MATERIALS: MAGNETIC MATERIALS
MR. ASIF L. JAMADAR

2. FERROMAGNETIC DOMAINS
 Why only small group of elements and compounds exhibits ferromagnetism
 Hypothesis of Weiss
 Exchange coupling & domains
 Size of domain
 Example of how total magnetization can be zero in single crystals and
polycrystals
 Possible ways by which the material is magnetized to saturation in the
direction of field 2

3.  A typical magnetization curve
 Sequence of domain arrangement with
increasing magnetic field

4.  Different types of hysteresis loops
 Control over the Coercive Force Hc
 Material used for transformer core
 Now, refined techniques are available

5. THANK
YOU
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