  We found that the AYFFF self-assemblies in the chloride solution of some
divalent cations ($Zn^{2+}, Mg^{2+},$ and $Cu^{2+}$) display super strong
paramagnetism, which may approach the mass susceptibility of ferromagnetism. We
attribute the observed super strong paramagnetism to the existence of the
aromatic rings, which interact with the cations through cation-{\pi}
interaction.
