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What are soft and hard magnetic materials? State the properties and applications

Mumbai university > FE > SEM 1 > Applied Physics 1

Marks: 5M

Year: Dec 2013

1 Answer
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Sr.No. Soft Magnetic Materials Hard Magnetic Materials
1 Soft magnetic materials are those materials which have a smaller area enclosed by their Hysteresis loop Hard magnetic materials are those materials which have a Larger area enclosed by their Hysteresis loop
2 They have low remnant magnetization They have high remnant magnetization
3 They have low coercivity They have high coercivity
4 They have high initial permeability They have low initial permeability
5 Hysteresis loss is less Hysteresis loss is higher
6 Eddy current loss is less Eddy current loss is more for metallic types and low for ceramic types.
7 Used in transformer cores, motors, generators, electromagnets, etc. Used in making permanent magnets, magnetic separators, magnetic detectors, speakers, microphones, etc.

Applications are-

Soft Magnets-

1) Power conversion electrical – mechanical.

2) Power adaption.

3) Signal transfer.

4) Magnetic field screening.

Hard Magnets-

1) Permanent magnets.

2) Data storage analog.

3) Data storage digital.

4) Quantum devices.

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