Question

what are the various ways in which magnets can lose their magnetism

Answer 1

Yes, it is possible for a permanent magnet to lose its magnetism. There are three common ways for this to occur: 1) Via heat: ferromagnet materials will lose their magnetism if heated above a point known as the Curie temperature.

Answer 2

1 By hammering the magnet
2 By not keeping them properly in the magnet keepers