Magnetism at the interface of non-magnetic Cu and C$_{60}$

The signature of magnetism without a ferromagnet in a non-magnetic heterostructure is novel as well as fascinating from fundamental research point of view. It has been shown by AlMari et al: that magnetism can be induced at the interface of Cu/C60 due to change in density of states. However, the quantification of such interfacial magnetic moment has not been performed yet. In order to quantify the induced magnetic moment in Cu, we have performed X-ray magnetic circular dichroism (XMCD) measurements on Cu/C$_{60}$ multilayers. We have observed room temperature ferromagnetism in Cu/C$_{60}$ stack. Further XMCD measurements show that ~0.01 $mu_B$/atom magnetic moment has been induced in Cu at the Cu/C$_{60}$ interface.