Is there such a thing as an active diamagnet?

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SUMMARY

An active diamagnet, defined as a material requiring a power source to block external magnetic fields, does not currently exist. In practical applications where superconductors are not feasible, mu-metal is the preferred choice for magnetic shielding due to its effective properties. This alloy is widely recognized for its ability to attenuate magnetic fields and is commonly utilized in various industries.

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  • Basic knowledge of superconductors and their limitations
  • Awareness of current flow and its effects on magnetic fields
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  • Research the properties and applications of mu-metal in magnetic shielding
  • Explore the principles of superconductivity and its practical limitations
  • Investigate alternative materials for magnetic field attenuation
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Physicists, materials scientists, and engineers involved in magnetic field management and shielding applications will benefit from this discussion.

cuallito
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Does something like an active diamagnet exist for when you need to block external magnetic fields, but a superconductor wouldn't be practical?
 
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What do you mean by "active" diamagnet?
 
cuallito said:
Does something like an active diamagnet exist for when you need to block external magnetic fields, but a superconductor wouldn't be practical?
If by ‘active’ you mean something that requires a power source (e.g. requires a current), then I’’ve never heard of one. For simple magnetic shielding, an alloy called ‘mu-metal’ is often used. E.g. see https://en.wikipedia.org/wiki/Mu-metal.
 
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