I was contemplating the impact of doping an Earth-like planet's core with a substance that alters its magnetic permeability. Specifically, I considered a scenario where the planet has an improved magnetic permeability by a factor of 2 compared to Earth. I don't care if this is unobtainium.
My initial thought was that this would result in a stronger magnetic field, causing a more powerful deflection of stellar wind. However, I am uncertain about whether this would lead to brighter or fainter auroras. I believe that this would not have a significant impact on technology, and hence, would not disrupt civilization.
On the other hand, I am concerned about the magnetohydrodynamics of the planet's outer core. Would the stronger magnetic field result in greater heating of the core material, leading to increased volcanism or continental drift? Alternatively, could the different core cause the energy balance to shift the other way, cooling the material and resulting in fewer of these effects?
Are there any physicist out there who would hazard a guess?