Do you mean, passing through a superconducting object? There are multiple explanations, all correct.TheCelt said:Summary: What causes the effect when the critical temperature is reached?
I've read about the Meissner effect, it seems to suggest that a magnetic field passing through an object gets ejected/repelled (is that the right phrase to use?) from the object after said object has surpassed the critical temperature (i presume pressure as well?)... but what's actually happening at the atomic level to give rise to this effect?
Which is also described at the end of the wikipedia article, where the link between the London effect and the Higgs mechanism is made.vanhees71 said:To be more precise: Superconductivity is effectively described by the Higgs mechanism of QED in the medium. In this connection one should really talk about the "Anderson-Higgs mechanism", because Anderson had the idea for superconductivity at the same time or even before Higgs, Brout, Englert, Kibble, Guralnik, and Hagen found it as the solution for the quibble about massive weak gauge bosons, i.e., how to get a consistent gauge theory with massive gauge bosons.
https://doi.org/10.1143/PTPS.86.43
The Meissner effect is a phenomenon in which a superconductor expels all magnetic fields from its interior when cooled below a certain temperature, known as the critical temperature. This results in the superconductor levitating above a magnet and exhibiting perfect diamagnetism.
The Meissner effect is caused by the expulsion of magnetic flux lines from the interior of a superconductor. This occurs due to the formation of superconducting Cooper pairs, which create a perfect diamagnetic response to any external magnetic field.
Only certain materials, known as superconductors, exhibit the Meissner effect. These materials have a critical temperature below which they can conduct electricity with zero resistance and exhibit perfect diamagnetism.
The Meissner effect has numerous technological applications, including in magnetic levitation trains, MRI machines, and particle accelerators. It also allows for the creation of powerful electromagnets with zero energy loss.
Scientists are currently researching ways to increase the critical temperature of superconductors, as well as exploring new materials that exhibit the Meissner effect. They are also studying the fundamental physics behind the phenomenon to better understand its properties and potential applications.