The study of the c($2{\times}2$) ordered Mn surface alloy Pd(001)

  • Jung, J.W. (Department of Physics, Hongik University) ;
  • Kim, S.H. (Department of Physics, SungKyunKwan University) ;
  • Park, C.Y. (Department of Physics, SungKyunKwan University) ;
  • Seo, J.K. (Department of Ophthalmic Optics, Chodang University) ;
  • Min, H.G. (Department of Physics, Hongik University) ;
  • Byun, D.H. (Department of Physics, Hongik University) ;
  • Kim, J.S. (Department of Physics, Sookmyung Women's University)
  • Published : 2000.10.01


We have deposited Mn on Pd(oon) at RT up to 30 ML. LEED pattern changed from p($1{\times}1$) to c($2{\times}2$) order below 0.5 ML Mn deposition. During Mn deposition, we have not found any changes in the peak position and the intensity of LEED I/V curve. Using LEED I/V curve analysis for each coverage, we found atomic structure and surface composition of c($2{\times}2$) ordered Mn alloy on Pd(001) surface. Above 1 Ml Mn, in the first layer the Mn subplane lies above the Pd subplane by 0.32 ${\AA}$. This result is very different from the earlier result of Jona et al., who contended that after annealing at 200 for 2 min, a buckled first layer with the Mn subplane lower than the Pd subplane by 0.2 ${\AA}$.