How to store a permanent magnet?

Self-demagnetization is the phenomenon by which magnet tends to become weak after some time if their poles are left free. To retain the magnetic property, permanent bar magnets are stored between soft iron piece called magnetic keepers. A magnetic keeper consists of a wooden piece with two magnets on its two sides and with the unlike pole on the same side. Magnets are always stored in pair and kept in opposite positions. However, one piece of soft iron is sufficient to store a horseshoe magnet.

Magnetic keeper

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