Magnetic Bar Question: Freezing to Zero Kelvin

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Freezing a magnetic bar to zero Kelvin is theoretically impossible, as absolute zero cannot be achieved in a finite number of processes. However, cooling a magnetic bar to very low temperatures, such as several Kelvin, can affect its magnetic properties. Generally, lowering the temperature can enhance a magnetic field's strength due to reduced thermal agitation of atoms. Conversely, heating a magnet can demagnetize it, indicating that temperature changes can significantly influence magnetic strength. Understanding these principles clarifies the effects of temperature on magnetic fields.
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I have a question about magnetic bars. If we froze a magnetic bar down to zero Kelvin, does it still have a magnetic field?
 
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Without wishing to sound rude, we cannot reach absolute zero [in a finite number of processes], so your question is moot. And as an aside the magnetic would not 'freeze'.
 
OK, we can not reach absolute zero, but we can reach as low as several K. So what does the magnetic field change when the m-bar is freezed to that low temperature? Will it increase or decrease?
 
pixel01 said:
OK, we can not reach absolute zero, but we can reach as low as several K. So what does the magnetic field change when the m-bar is freezed to that low temperature? Will it increase or decrease?

Maybe you should consider this. How would one destroy the magnetic strength of a permanent magnet? Does one chill down to low temperatures, or does one heat it up? If you can answer this question (which, I think, is something that is covered in elementary science classes), then you have a clue in the answer to your question.

Zz.
 

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