Ferromagnetic substances

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Ferromagnetic substances : 

These are the substance which are strongly attracted by the magnetic field and exhibit permanent magnatic behaviour even when magnetic field is removed. Examples, Fe,Co,Ni,CrO². 

    The properties of ferromagnetism arises due to the alignment (orientations) of magnatic moment in the direction of the external magnetic field and as a result a strong magnetic field is produced and the substance behaves like a permanent magnet. For example, CrO² is used to make magnetic tapes in audio and video recorders.

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