Anomalous double peak structure in Nb/Ni superconductor/ferromagnet tunneling DOS

P. SanGiorgio, S. Reymond, M. R. Beasley +2

We have experimentally investigated the density of states (DOS) in Nb/Ni (S/F) bilayers as a function of Ni thickness, $d_F$. Our thinnest samples show the usual DOS peak at $\pmΔ_…