What is the hard-magnetic and soft magnetic materials
Hard magnetic material (permanent magnet) that can be magnetized to maintain a permanent magnetic materials commonly have a high carbon steel, aluminum, nickel-cobalt alloy, titanium, cobalt alloy, barium
ferrite, etc. also used in magnetic recording, such as audio tapes,video tapes , computer disk powder.
Magnetized soft magnetic material that can not maintain their magnetic properties. Such as soft iron, silicon, iron-nickel alloys. Used to make transformers, solenoid, etc.
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