Diamagnetism confusion -- Does diamagnetism really have to do with Lenz’s law?

[yymm]

Homework Statement

Does diamagnetism really got to do with Lenz’s law?

Relevant Equations

NA

In my textbook, and on many websites it says that when placed in a magnetic field and then due to Lenz’s law a magnetic dipole moment is created in atoms and so the material gets attracted to the magnet? But then in the case I bring the magnet close to the material very slowly( so the change in magnetic flux is very low), or I put the magnet there for a long time, stationary, then does that mean the material no longer gets magnetised?

 

[nasu]

What kind of material? The diamagnetic materials are not attracted.

 

[kuruman]

The answer is that Lenz's law has nothing to do with diamagnetism which is a quantum phenomenon. Lenz's law involves changing magnetic fields. However, all atoms exhibit diamagnetism and do so in steady magnetic fields. The effect has to do with electron orbits excluding magnetic flux. I think your textbook explanation is an attempt to explain diamagnetism as induced eddy currents at the atomic level. As is usual with classical models applied to quantum phenomena, the model falls short.

This Wikipedia article has more information.

 

[yymm]

What kind of material? The diamagnetic materials are not attracted.

sorry I was meant to say repel instead of attract. Thanks for picking it up!

 

[yymm]

The answer is that Lenz's law has nothing to do with diamagnetism which is a quantum phenomenon. Lenz's law involves changing magnetic fields. However, all atoms exhibit diamagnetism and do so in steady magnetic fields. The effect has to do with electron orbits excluding magnetic flux. I think your textbook explanation is an attempt to explain diamagnetism as induced eddy currents at the atomic level. As is usual with classical models applied to quantum phenomena, the model falls short.

This Wikipedia article has more information.

Yeah probably. If I haven't studied quantum mechanics yet then is it enough to know that diamagnetic materials gets repelled?

 

[kuruman]

$\dots~$ yet then is it enough to know that diamagnetic materials gets repelled?

Enough for what? If you have not studied quantum mechanics but you are worried what will be on the next test, it is probably "enough" to know qualitatively the distinguishing features of diamagnetism, paramagnetism and ferromagnetism.