Diamagnetism

Iron is a strong ferromagnetic material. But, it's not the best at being a permanent magnet.

By adding other elements, once can alter the materials magnetic domains and achieve truly collosal magnetic fields. Neodymium Iron Boron magnets.

Now, this is simple ferromagnetism. One can impose a super strong magnetic field and charge the material (the hard way) or raise it above the Tc, apply a strong field and then cool it below Tc in the presence of the field. This results in a nice magnetic field.

Now, in materials like Bismuth, diamagnetism exists. In this effect, the magnetic domains align to counter the imposed field. This effect is most strong in a normal superconductor.

Cross fertilize the ideas. By alloying Bismuth, one can create a super diamagnet.

This would be a material that would allow maglev at room temperature without any superconductors needed.

The possibilities are endless.