Why Do Magnets Work Better When They Are Cold?
Increasing the efficiency of magnets, whether they are man-made superconducting magnets or pieces of iron, can be accomplished by altering the temperature of the material or device. Understanding the mechanics of electron flow and electromagnetic interaction allows scientists and engineers to create these powerful magnets. Without the ability to improve magnetic fields by lowering temperature, beneficial high-power magnets, such as the ones used in MRI machines, would be out of reach.
