5.3 Diamagnetism Flashcards
Which materials are diamagnetic?
All of them
When does paramagnetism dominate?
When J is not equal to 0
When can we observe diamagnetism?
When J = 0
Why does diamagnetism occur classically?
Because the presence of a magnetic field alters the orbit of the electrons
- This means the electrons generate a magnetic field that opposes B (magnetic susceptability is negative)
Why do we get Landau diamagnetism?
Because we have to consider the conduction electrons as well as the core electrons
- Caused by the formation of the Landau levels
Which type of magnetism is Pauli diamagnetism concerned with?
The conduction electrons only (Their spin)
What is the value of the total magnetic susceptability for diamagnetism?
Negative
Give an application/use for diamagnetism
Diamagnetic levitation of diamagnetism dominates
- Can create microgravity conditions without going into space for small volumes e.g. cm cubed
What two conditions are necessary for diamagnetic levitation?
Need a strong B field and a strong dB/dz
