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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?
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.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?
A diamagnet is a material that produces a weak magnetic field in the opposite direction when placed in an external magnetic field. This causes the material to be repelled by the magnet.
An active diamagnet is a material that not only exhibits diamagnetic properties, but also actively responds to changes in the external magnetic field. This means that the material can move or change its shape in response to the magnetic field.
Some examples of active diamagnets include superconductors, living organisms such as frogs and geckos, and certain types of liquid metals.
An active diamagnet works by inducing a current in the material in response to an external magnetic field. This current then produces its own magnetic field, which opposes the external field and causes the material to move or change shape.
Active diamagnets have potential applications in levitation technology, medical imaging, and transportation systems. They could also be used in sensors and actuators for precise control and manipulation of objects.