How does temperature affect a magnet?

Question

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Answer 1

A normal (bar or horseshoe) magnet will permanently lose its magnetism if heated.

Answer 2

confident! All ferromagnetic supplies (supplies which would be magnetized, like steel) have a temperature, talked approximately as the Curie temperature, the place they give up being magnetic. This temperature is under the melting factor. Ferromagnetic supplies exist using fact that's energetically favorable for the magnetic moments of electrons to be aligned in those supplies. there is an power linked with this alignment, talked approximately as the exchange power. there is likewise thermal power, that desires the electron magnetic moments to point in random instructions. So, at low temperatures, exchange power is important, and all the electron magnetic moments align, and additionally you have a magnet. At severe temperatures, thermal power is important, so the magnetic moments evaluate random instructions, and the fabric isn't magnetic. The transition between those 2 behaviors happens on the Curie temperature. Edit: in case you boost the temperature of a magnet only somewhat, the flexibility of the magnet decreases only somewhat. The power will return while the magnet cools. This consequence is particularly vulnerable if till you're close to the Curie temperature. Midatlantian2 is authentic which you would be able to place a warm cloth in a reliable utilized field and while it cools it's going to be strongly magnetized. the ethical of the story: Thermal power we could magnetic moments reorient. At low temperatures, they are locked in place by utilising exchange power.

Answer 3

There is a limit on a ferromagnetic substance magnefic field interaction. This limit is temperature. At a certain temperature called the "Curie "Temperature" the magnefic field cannot be sustained in the material.
That is the Reason that the core of the Earth cannot be molten iron at a temperaure of 2000 K. At that temperature the core of the Earth could not support a magnetic field. Injecting mass radiation in a material changes the Electrostatic and Magnetostatic configuration of its atoms.
The magnetism in atoms is caused by the coordinated direction and interaction of the Electrons and their spins. When enough electrons having the same spin would interact to integrate the strenght of the magnetic field.The spin of the electron causes a twisting of the space structure around it ;Hence a magnetic power storage occurs. When this is set we say the material is magnetized.

Answer 4

Most magnets are formed by molecules in metal being aligned in a specific direction. Typically, metal is heated, subjected to a strong magnetic field causing all the molecules to align in one direction, and then allowing the metal to cool (solidify) quickly. The stronger bonds of the metal trap the molecules in a specific orientation.

Heating a magnet causes the molecules to vibrate and bounce off other nearby molecules. Eventually, they can gain enough distance to break the bonds holding them in alignment and rotate freely into random positions. Without enough molecules aligned in the same direction the magnetic field is no longer generated.

Answer 5

Try a search for 'curie temperature'

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