Why Can't Diamagnetism Occur in Classical Mechanics?

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Discussion Overview

The discussion centers on the occurrence of diamagnetism within the framework of classical mechanics, exploring theoretical implications and interpretations of related principles such as Lenz's law and the Bohr-van Leeuwen theorem.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant questions why diamagnetism cannot occur in classical mechanics and seeks further information.
  • Another participant argues that diamagnetism does occur in classical mechanics, citing Lenz's law as a classical equivalent where a magnetic moment opposes changes in an applied magnetic field.
  • A third participant references the Bohr-van Leeuwen theorem, suggesting it implies that diamagnetism is not possible in classical mechanics.
  • A later reply clarifies that while the Bohr-van Leeuwen theorem rules out magnetic ordering in classical mechanics, it does not negate the possibility of diamagnetism as a response to a magnetic field.

Areas of Agreement / Disagreement

Contextual Notes

There are unresolved interpretations regarding the definitions of diamagnetism and magnetic ordering, as well as the implications of the Bohr-van Leeuwen theorem in this context.

Magister
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Why diamagnetism can't occur in classical mechanics?

Where can I know more about that?

Thanks
 
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But it does! Any application of Lenz's law where a magnetic moment tries to oppose change in an applied field is essentially the classical equivalent of diamagnetism.
 
What about the Bohr-van Leeuwen theorem?
Doesn't it states that there is no diamagnetism in classic mechanics?
 
Bohr-van Leeuwen is a theorem ruling out magnetic ordering in classical mechanics. However, diamagnetism is a response to a magnetic field, not a type of magnetic ordering, so all is well.
 

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