MAGNETIC NATURE OF (100)SURFACES OF BCC RUV, RHV, AND PDV BINARY-ALLOYS

Based on ab initio calculations we predict that the (100) surfaces of the RuV, RhV and PdV binary alloys in the bcc structure are magnetic o ver a broad concentration range although they are nonmagnetic in the b ulk and the metals V, Ru, Rh, and Pd are nonmagnetic in the bulk and a t the surface. We find that the magnetic moment is basically located a t the V site in the surface plane of the alloys and the V moment can b e as large as about 1 mu(B) for an alloy with 75% V concentration. The origin of the surface magnetism is traced back to a surface state of V(100), which becomes occupied due to alloying. Additional nonmagnetic alloys with magnetic surfaces are suggested.