Can a magnet withstand high temperature?

Also, what else could happen to a magnet that would cause it to loose it's magnetic property?

10 Answers

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  • Anonymous
    1 decade ago
    Favorite Answer

    Minimal temperature changes can be reversed, however, each material has a maximum temperature where metallurgical changes occur within the magnet structure and where the individual magnetic domains breakdown. Once these losses occur they cannot be reversed by remagnetising.

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  • goring
    Lv 6
    1 decade ago

    Present theories in physics believe that the earth is a giant magnet stemming from a very vely hot molten Iron core.That is a very high temperature magnet ! If that is true then there must exist a substance that combined with the iron core that can produce magnetism at high temperature?On the Other hand we cannot always believe theory even though theory postulate how magnetism occur on the earth as a giant magnet I still am very sckeptical of the magnet theory of the earth.

    When I heated a steel magnet red hot after it cooled it attracted no iron fillings. So if my experiment was correct a heated magnetic material does not hold magnetism.

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  • Tom H
    Lv 4
    1 decade ago

    The critical temperature is called the "Curie temperature" after Pierre Curie, husband to Marie Curie who discovered radium. Above the Curie temp. the magnetism of a permanent magnet will disappear. The actual Tc values vary a great deal between material types.

    It is also true that a sharp impact can demagnetize a magnet. And finally, demagnetizers can be built, like a bulk tape (audio/video) demagnetizer.

    Source(s): A Ph.D. in physics.
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  • 1 decade ago

    Natural magnets, as opposed to those created by the flow of electricity through a coil, are created by the alignment of atoms that are magnetic. If the temperature is high enough to allow these atoms to realign randomly, rather than in one direction, the over all effect would be the loss of the magnetism in that material.

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  • LeAnne
    Lv 7
    1 decade ago

    In the real world, yes. Pounding on a magnet or exposing it to a stong opposing field can also make it pretty numb. The metal bar that is placed across a horseshoe magnet is called a keeper - because it concentrates the magnetic field of the magnet within itself and keeps it from being exposed to opposing fields. Irregardless of the strength or weakness of the stray magnetic fields - they will eventually weaken the magnet.

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  • 1 decade ago

    Yes, magnets have something called a curry i think. Where at a defined temperature they lose all magnetic properties. And storing them close together will cause them to slowly lose that property as well.

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  • Kirk M
    Lv 4
    1 decade ago

    google curie point and also coercivity.

    Try wikipedia as well.

    Electromagnets work as long as the insulation holds on the wire.

    and there is power.

    The sun and earth have magnetic fields due to electron flow. They arent permanent magnets. Notice sunspots are darker than the photosphere. The suns atmosphere is electrically pumped to higher temperature than the "surface" of the sun

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  • 1 decade ago

    HI,magnetism is physical property,which can be change by physical method., At high temprature,magnetic substance lose magnetic property,,for every magnetic substance their is specific temprature called CUREE temprature,at which magnetic substance loose magnetic property,,,magnetism arises due to unpair electron,spin and orbital motion of electron,at high temprature squence of electron(which is cause of magnetism) disturbe ,so substance demagnatised,,,

    Source(s): own knowledge
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  • waif
    Lv 4
    1 decade ago

    just how hot did you want to go? our own sun it turns out is a pretty good magnet you know!

    take a look at the url below:

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  • 3 years ago

    made up of large accomplishing cloth to style solenoid (smooth-iron middle ), immersed in cryogens (to make the conductor large-accomplishing).intense Magnetic container produced (round 25T).

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