5.3 Diamagnetism Flashcards

1
Q

Which materials are diamagnetic?

A

All of them

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2
Q

When does paramagnetism dominate?

A

When J is not equal to 0

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3
Q

When can we observe diamagnetism?

A

When J = 0

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4
Q

Why does diamagnetism occur classically?

A

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)

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5
Q

Why do we get Landau diamagnetism?

A

Because we have to consider the conduction electrons as well as the core electrons
- Caused by the formation of the Landau levels

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6
Q

Which type of magnetism is Pauli diamagnetism concerned with?

A

The conduction electrons only (Their spin)

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7
Q

What is the value of the total magnetic susceptability for diamagnetism?

A

Negative

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8
Q

Give an application/use for diamagnetism

A

Diamagnetic levitation of diamagnetism dominates

- Can create microgravity conditions without going into space for small volumes e.g. cm cubed

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9
Q

What two conditions are necessary for diamagnetic levitation?

A

Need a strong B field and a strong dB/dz

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