The implementation at NASA is irrelevant. We are not a real like space program wiki or a speculative engineering wiki. As such, what NASA does in the modern day is nothing to do with us or our site.
Here is the implementation of this idea of NASA, however, it is much less like the armor of UNSC ships: https://www.nasa.gov/directorates/spacetech/niac/2018_Phase_I_Phase_II/Spacecraft_Scale_Magnetospheric_Protection_from_Galactic_Cosmic_Radiation/
Either way this counts as speculative. Only content verified by official source material should be used.
Speculative content this is "to more efficiently transfer the heat generated by the ship into space". Unlike the content of these words, i described the principle of operation of magnetic armor based on superconducting radiators, such as the principle of gunpowder or a magnetic accelerator. Only two facts are important - radiators are built into the armor of the spacecraft and they are thermal.