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Name: michael
Status: student
Age: N/A
Location: N/A
Country: N/A
Date: 2000-2001


Question:
Does cold have an effect on magnetism?


Replies:
Yes. temperature [which I think you mean by "cold"] can have a profound effect on magnetism. Many permanent magnets will permanently lose their magnetism if heated above certain temperature. Other materials turn on and off magnetism, depending upon the temperature. At extremely low temperatures, say less than 4 Kelvin, where much of the thermal agitation of atoms and molecules of a material has disappeared, magnetism is a very important phenomenon.

Vince Calder


Cold can have an effect on magnetism, because cold can have an effect of how fast charged particles move. It is the motion of charged particles, usually electrons around a nucleus, that produces magnetic fields. Cooling a metal can make the motion within less random, thus allowing more atoms to line up with each other. This increases the magnetic field of the material. On the other hand, making a magnet very hot will cause more random motion, resulting in less allignment of molecules and less megnetism.

Kenneth Mellendorf



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