Why Can't Diamagnetism Occur in Classical Mechanics?

[Magister]

Why diamagnetism can't occur in classical mechanics?

Where can I know more about that?

Thanks

 

[Gokul43201]

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.

 

[Magister]

What about the Bohr-van Leeuwen theorem?
Doesn't it states that there is no diamagnetism in classic mechanics?

 

[LinearResponse]

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.