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How to demagnetize a magnet?
A magnet is an object that has a magnetic field. The word magnet comes from the Greek "magnítis líthos" (μαγνήτης λίθος), which means "magnesian stone". Magnesia is an area in Greece (Now Manisa, Turkey ) where deposits of magnetite have been discovered since antiquity. How to demagnetize materials Permanent magnets can be demagnetized in the following ways: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
- Heat. Heating a magnet past its Curie point will destroy the long range ordering.
- Contact. Stroking one magnet with another in random fashion will demagnetize the magnet being stroked, in some cases; some materials have a very high coercive field and cannot be demagnetized with other permanent magnets.
- Hammering and/or Jarring. Such activity will destroy the long range ordering within the magnet.
- Being placed in a solenoid which has an alternating current being passed through it. The alternating current will disrupt the long range ordering, in much the same way that direct current can cause ordering.
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To demagetize a magnet you could smash one if the ends with a hammer. this will cause the order of atoms to rearange so that it's not magnetic.
Does the Temperature of a magnet affect its strength
to demagnetize a magnetized steel bar, just hammer or heat it .. that works !
Drop it on the floor a few times. . Hit it with a hammer a few times. . Heat it red hot in the stove flame. . Wrap several turns of wire around it and run a high AC current… through for a while.
Repeated striking, heating, or using AC current will demagnetize a magnet. A small magnetic field may remain. It can be demagnetised by: -dropping it many times -hammering it …many times -heating it over a flame Heat and impact
no you can't
By heating it up and then quickli cool it under cold water, by hitting a magnet with a hammer or simply by dropping it on a hard floor.. Hareema Amber
by heating to an extreamly high temperature
By placing Iron in a strong magnetic field, the field will turn the iron into a magnet. If you melt the iron and then allow it to resolidify, it will drop the magnetic charge …(and you can charge it again if you wish).
The good way is to borrow or construct a coil of wire large enough to allow the magnetic object to pass through. Energise the coil with standard house current - 50 Hz or 60 Hz… according to where you live. You won't necessarily be able to put the full 115V / 230V (according to your country). A step-down transformer may be required; if you can borrow a Variac it gets much easier. When the coil is properly energised, pass your magnetic object through the coil slowly. As it exits the far side keep it moving steadily until it is far from the coil. Switch off and test for any remanent magnetism. If necessary, repeat the process. Note. Some magnetic materials are tenacious; in general harder materials like tool steel or ceramic are the hardest magnetically as well. You can try annealing the material, providing that won't ruin the object for its intended use; not a good idea to anneal a wrench until it is dead soft! PS If you don't understand electricity, get help from someone who does.
-- Stick it in a gas flame and heat it to glowing. -- Drop it on the floor or hit it with a hammer a few times. -- Stick it into a DC-current-carrying coil of wire for a w…hile, in the direction opposite to the way the poles appear when you do the same with an unmagnetized piece of iron. -- Stick it into an AC-current-carrying coil of wire for a shorter while, in either direction.
An electronic magnet is by far the easiest because you magnetize one by hitting a button (or for home made magnets) connecting a wire, and demagnetizing by hitting the button …again or disconnecting the wire.
By keeping them in magnet keepers
ironically, one way is to hammer it, as in smashing it can cause it to lose its magnetism.
In a magnet, the alignment of the magnetic fields produced by the magnetic atoms (iron, cobalt, etc) in the magnet is what gives it its magnetic properties. Anything that can …randomise the spacial orientation of these magnetic atoms will demagnetise the magnet. Some examples of ways to do this are heating the magnet above its Curie temperature or striking it repeatedly with sufficient force (e.g. hitting it with a hammer).