The two types of magnetic media are
1.HDD ( hard disk drive)
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1.properties of hard magnetic materials
Hard magnetic materials are used in permanent magnetic which have high resistance to demagnetization.
Hard magnetic materials have high value of retentivity, coercivity, saturation flux density as well as low initial permeability and high hysteresis energy loss.
2.properties of magnetic storage
Magnetic materials are important in the area of information storage such as computers ipods, mp3 players, high definition cam coders, credit cards.
In computers, semiconductors elements are primary memory storage device where as magnetic hard disk are secondary memory device because they are capable of storing large quantity of information at lower cost..