Jonathan Goff has an interesting blog post on the application of powerful magnetic fields, to provide supplementary aerobraking, TPS and aerodynamic control:

• MHD Aerobraking and Thermal Protection: Part I - Introduction -- Selenian Boondocks

I can't help but wonder whether the powerful YBCO superconducting magnets being produced by the Cambridge University spin-off Magnifye might find an application here.

• Magnifye Makes Powerful 17 Tesla Superconducting Magnets That Take up 2 Million times Less Space and Are Cheaper to Charge -- Next Big Future

Given that the Magnifye method produces magnets which are more than ten times as powerful as conventional magnets, and the MHD braking term depends on the square of the B-field, this might well be an approach worth looking at. The spacecraft would have to carry an LN2 system to keep the magnets chilled to superconducting temperatures, but might not actually need much because of the efficiency of the magnets. An interesting engineering challenge for someone!

Magnifye currently doesn't list any space applications for their systems. Perhaps they should...