Journal of the Physical Society of Japan
Vol.62 No.11, November, 1993 pp.3954-3964 

                      Modulation of the Magnetic Adlayer by External Field 

                                       Norikazu Ishimura and Takao Yamamoto1 

                            Department of Physics, Faculty of Engineering, Gunma University,
                                               Kiryu, Gunma 376
                          1Department of Physics, Faculty of General Studies, Gunma University,
                                               Kiryu, Gunma 376 

                                              ( received June 14, 1993 ) 

    A model which simulates a system of magnetic-atom chain adsorbed on a crystal surface is proposed. The present model differs from the
  conventional Frenkel-Kontorova model at the point that each atom in the adlayer chain is magnetic and the strength of the exchange interaction
  between the nearest neighbor adatoms varies with the distance between the two atoms. The chain of the adsorbed atoms is modulated by an
  external magnetic field. The properties of the system at zero temperature and low temperatures are discussed by the effective potential method. 

KEYWORDS: magnetic adlayer, adlayer modulation, Frenkel-Kontorova model, antiferromagnetic interaction, effective
      potential method