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What's a really specific problem you have? (lemm.ee)

submitted 4 days ago by [email protected] to c/[email protected]

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[–] [email protected] 5 points 3 days ago (2 children)

Ferromagnetism (permanent magnetism in iron and iron alloys) happens when iron atoms (that are small magnets themselves) align to sum their magnetic fields and form a strong one we can experience in the macroscopic world.

When the magnet is heated, atoms are more energetic and more free to move around, they misalign because each atom is repelled by the others (equal poles repel each other, so when aligned they are in a constant state of repulsion, but if the material is cold they are "locked in") and the magnetic field disappears.

[–] [email protected] 1 points 7 hours ago

they misalign because each atom is repelled by the others (equal poles repel each other, so when aligned they are in a constant state of repulsion

I'm not sure this is true. When aligned, aren't all the domains lined up north to south, which would be a state of attraction?

[–] [email protected] 1 points 3 days ago

Thank you for the explanation!