Suppose we put a diamagnetic material (such as Bismuth or Pyrolytic Carbon) under a strong magnet (see image below). It would create opposing magnetic fields. Would the opposing magnetic field be strong enough to attract ferromagnetic or paramagnetic materials? Or could it induce magnetic fields in paramagnetic or ferromagnetic materials with high magnetic permeability? And how we can calculate the strength of the magnetic field?
The opposite force resulted from diamagnetic material will be weak to attract paramagnetic materials even if you add more magnets to the diamagnetic material.