Superconductor Flux pinning/Meissner effect with electromagnets?

In summary, superconductor flux pinning is a phenomenon that occurs when a type II superconductor is placed in a magnetic field, creating a stable state for the superconductor. It is related to the Meissner effect and can be created using electromagnets. Some practical applications include magnetic levitation, high-field magnets, and superconducting power cables. However, there are limitations and challenges, such as the need for type II superconductors and difficulties in manufacturing and maintaining stability in real-world applications.
  • #1
BigDogPhysics
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I was reading about high temperature superconductors expelling magnetic fields (Meisner effect). I was curious if this only works with permanent magnets or is there similar effects with electromagnets. I assume since the magnetic waves would be similar there would be a similar reaction, but everything I read or experiments involve permanent Earth magnets. Any insights would be appreciated!

Alex
DePaul University
 
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  • #2
What mechanism that generates the magnetic field makes no difference if that is what you are asking.
 

1. What is superconductor flux pinning?

Superconductor flux pinning is a phenomenon that occurs when a superconductor is placed in a magnetic field. The magnetic field lines become "pinned" to the superconductor, preventing them from moving and causing the superconductor to exhibit perfect diamagnetism.

2. How does the Meissner effect relate to superconductor flux pinning?

The Meissner effect is a direct result of superconductor flux pinning. When a superconductor is placed in a magnetic field, the field lines are expelled from the interior of the superconductor, causing it to exhibit perfect diamagnetism. This is known as the Meissner effect.

3. Can electromagnets be used to create superconductor flux pinning?

Yes, electromagnets can be used to create superconductor flux pinning. By applying a strong magnetic field using an electromagnet, the magnetic field lines will become pinned to the superconductor and cause it to exhibit the Meissner effect.

4. What are the practical applications of superconductor flux pinning?

Superconductor flux pinning has many practical applications, including in magnetic levitation, magnetic resonance imaging (MRI) machines, and particle accelerators. It is also being researched for use in high-speed trains and energy storage systems.

5. Are there any challenges or limitations to using superconductor flux pinning?

One of the main challenges of using superconductor flux pinning is maintaining the low temperatures required for superconductivity. Another limitation is the cost and complexity of creating and maintaining strong magnetic fields using electromagnets. Additionally, not all materials exhibit superconductor flux pinning, so it is important to carefully select the appropriate superconductor for each application.

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