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www.physlink.com/education/askexperts/ae472.cfm

Yes, it is possible for a permanent magnet to lose its magnetism. ... 2) Via a demagnetizing magnetic field: permanent magnets exhibit a ... energy is transmitted through the material via a shock, such as being dropped or hit with a hammer.

www.quora.com/Why-do-magnetic-domains-misalign-when-a-magnet-is-repeatedly-hit

The lowest potential energy situation magnetically is for the domains to be fairly ... to find out how much does hitting a magnet affect its magnetic field strength. ... but these walls can be weakened and moved by high temperatures or ... If you strike the incline repeatedly, the block will walk its way toward the ...

www.instructables.com/answers/Is-it-possible-to-make-the-magnets-lose-it-magneti

Mar 12, 2009 ... I know magnets can lose its magnetic properties if exposed to heat, ... old magnets tent to have lost magnetism because of all hitting and banging that they are used under. Bigger magnets loose their strength faster because they tend to .... and the relative motion of other magnetic fields can weaken them.

www.x-magnet.net/faq.html

All of the below methods act to randomize the unit magnets or magnetic dipoles ... Heating a magnet past its Curie point will destroy the long range ordering. ... reduce the strength of the (electro-)magnetic field, the magnetism of the magnet can ... becomes a strong magnet in the present of the current but weaken drastically ...

van.physics.illinois.edu/qa/listing.php?id=2744

At some point, in between the weakening of the overall magnetism and ... Usually the strength of a permanent magnet does grow slightly as it is cooled. ... all these characteristics of the magnet losing its magnetic power when ...

ask.metafilter.com/235019/Can-I-weaken-a-neodymium-supermagnet

Heat will demagnetize them. I'm not sure if it's controllable. ... Hitting them will give you a bunch of magnetic shards. Freezing won't help. As it turns out, ... How strong does a magnet have to be to erase an iPod? June 19, 2011

www.apexmagnets.com/news-how-tos/magnet-experiments-what-happens-when-a-magnet-is-heated

Jun 10, 2014 ... Magnet strength can be affected by certain environmental changes like temperature ... It is because of permanent magnets' ability to create their own magnetic ... Now that you have tested how heat affects magnets how do you ...

www.coolmagnetman.com/magstren.htm

Br is the measure of its residual magnetic flux density in Gauss, which is the maximum ... Let's do an experiment to show the effect of temperature on magnets.

www.answers.com/Q/Why_does_a_permanent_magnet_weaken_when_you_drop_or_heat_it

Dropping, hitting, or heating a magnet will disturb the magnetic field-the spin of the ... a magnet its magnetic domain-north or south-and creates a magnetic field.

sciencing.com/causes-magnet-lose-its-magnetism-8229455.html

Permanent magnets naturally weaken with time. ... A magnet gets its field when microscopic magnetic areas, called domains, all line up in ... Most permanent magnets can hold up to being dropped a few times, but it will lose strength from ... Metals · Materials That Can Be Magnetized · How Do Neodymium Magnets Work ?