Open AccessMetal-ceramic interfaces: Overlayer-induced reconstruction and magnetism of 4d transition-metal monolayers
Author(s) -
Ruqian Wu,
Arthur J Freeman
Publication year - 1995
Language(s) - English
Resource type - Reports
DOI - 10.2172/69417
Subject(s) - overlayer , magnetism , monolayer , magnetic moment , transition metal , condensed matter physics , materials science , fermi level , ferromagnetism , metal , ceramic , substrate (aquarium) , crystallography , chemistry , nanotechnology , metallurgy , physics , catalysis , biochemistry , oceanography , quantum mechanics , geology , electron
Structural, electronic, and magnetic properties of metal-ceramic interfaces, M/MgO(001) (M=Pd, Rh, and Ru), have been investigated using the full potential linearized augmented-plane-wave method. Ru and Rh monolayers are found to be able to retain large spin magnetic moments on MgO(001) (1.95 {mu}{sub B} and 1.21 {mu}{sub B} for Ru and Ph; respectively) -- indicating, in principle, the potential application of MgO(001) as a benign substrate for 4d monolayer magnetism. Significantly, according to our atomic-force determinations, the metal overlayers induce a sizable buckling reconstruction in the interfacial MgO layer, which enhances the M-MgO binding energy by 0.1 eV. The weak M-0 interaction is mainly via tail effects; however, it affects the density of states at the Fermi level for Pd/Mg0(001) significantly and completely eliminates the small magnetic moment of the free Pd monolaver (0.34{mu}{sub B})