I understand a little about eddy currents and synchrotron radiation; I believe I am correct in saying that they are examples of energy loss (essentially drag) when moving though a gradient of magnetic flux. But are there any materials/effects/things that cause drag when moving through a uniform magnetic field? In other words: say we have an object moving through an infinite, uniform magnetic field in a vacuum; what properties or components does the object need to have in order to eventually come to rest relative to the magnetic field? Are there several possibilities? Would it matter whether it was moving parallel/perpendicular to the field lines? Thanks for any input!