Abstract :
In-situ scanning tunneling microscopy STM.and in-situ alternating gradient field magnetometry AGFM.are used in
combination to characterize the structure and magnetic behavior of CorAu 111. layers electrodeposited from CoSO4
solutions, with anions XsCly and SCNy added in amount traces. In the Cly solution, the 2-D growth process is briefly
recalled. In the thiocyanate SCNy. solution, preliminary observations show that nanometer clusters accumulate on top of a
Co underpotential deposition UPD.monolayer. Both structures solutionrCorAu 111.exhibit perpendicular magnetic
anisotropy PMA.for a Co thickness tFt), with t);2 ML in the Clysolution and ;4–5 ML in the SCNyone. Results
are briefly discussed in light of classical models for PMA in ultrathin films. q2000 Elsevier Science B.V. All rights
reserved.
