INDUCED MAGNETISM OF 4D TRANSITION-METALS - RH AND RU FE(001) OVERLAYERS AND SANDWICHES/

The structural, electronic, and magnetic properties of mono and bilaye r Rh and Ru transition metals deposited on a Fe(001) substrate or sand wiched by an additional Fe layer have been determined by using the hig hly precise local density full-potential linearized augmented plane-wa ve method. Significantly, the atomic force determinations demonstrate that a large interfacial relaxation plays an important role in their e lectronic and magnetic properties. Both mono and bilayer Ru and Rh in the systems considered are found to be able to retain large spin magne tic moments. The ground state of bilayer Rh is found to have its momen ts coupled antiferromagnetically. In good agreement with x-ray magneti c circular dichroism (MCD) measurements, the deposition of Rh layers o n Fe(001) is found to enhance the Fe spin magnetic moments in the inte rface. Calculated values of the spin and orbital parts of the magnetic moments and the MCD spectra are presented, and the role of overlayer- substrate hybridization is discussed. (C) 1997 American Institute of P hysics.