Give the properties and application of permanent magnetic materials.
Permanent magnetic materials:
Properties:
- Permanent magnetic materials have a huge area of hysterisis loop.
- They have large coercivity and retentivity.
- High saturated values.
- High residual magnetism
- Permanent magnetic materials are hard to be magnetized.
Applications: Permanent magnetic materials are used to make permanent that finds application in electric machines, relays and measuring instruments, loudspeakers and microwave devices.