  We continue the study of a recently constructed holographic QCD model
supplemented with magnetic field. We consider the holographic dual of a quark,
anti-quark pair and investigate its entropy beyond the deconfinement phase
transition in terms of interquark distance, temperature and magnetic field. We
obtain a clear magnetic field dependence in the strongly decreasing entropy
near deconfinement and in the entropy variation for growing interquark
separation. We uncover various supporting evidences for inverse magnetic
catalysis. The emergent entropic force is found to become stronger with
magnetic field, promoting the quarkonium dissociation. We also probe the
dynamical dissociation of the quarkonium state, finding a faster dissociation
with magnetic field. At least the static predictions should become amenable to
a qualitative comparison with future lattice data.
