A study was made of the spin-resolved electronic properties of dislocation lines on a Fe double-layer on W(110) using spin-polarized scanning tunneling spectroscopy. The data revealed that the dislocation lines were ferromagnetically ordered, with the magnetic contrast exhibiting a pronounced bias-dependence. By comparing tunneling spectra which were measured on the pseudomorphic double-layer at various lateral separations from the dislocation line, a pronounced shift of a peak was found which originally appeared at positive sample bias towards the Fermi level. However, the binding energy of a peak just below the Fermi level remained constant, but increased in intensity. This caused a marked modification of the bias voltage-dependent magnetic asymmetry.

Spin-Polarized Scanning Tunneling Spectroscopy of Dislocation Lines in Fe Films on W(110). M.Bode, K.von Bergmann, O.Pietzsch, A.Kubetzka, R.Wiesendanger: Journal of Magnetism and Magnetic Materials, 2006, 304[1], 1-5