MAGNETISM OF RH VICINAL SURFACES

We investigate in detail the magnetic behavior of the (105) Rh vicinal surface. Fully self-consistent tight binding calculations with the Hu bbard Hamiltonian are per-formed. We study especially the onset of mag netism, versus the exchange integral J. This stepped surface displays an onset of magnetism for similar value of J as that for the (001) sur face. Simple and empirical rules allow to understand the magnetic mome nts distribution. Original magnetic configurations are found: all coup lings are ferromagnetic, except between the second and the third plane s parallel to the step surface. This vicinal surface is no more favora ble than the (001) surface to present live magnetism.