Crossover from two- to three-dimensional magnetic disorder in submonoatomic ferromagnetic layers

Article

关键词: METAL-INSULATOR-TRANSITION;    LOW-TEMPERATURE;    FILMS;    SUPERCONDUCTIVITY;    MAGNETORESISTANCE;    ALLOYS;    CONDUCTIVITY;   

DOI  :  10.1103/PhysRevB.68.100408

来源: SCIE

【 摘 要 】

We present transport and magnetoresistance (MR) measurements performed on quench condensed ultrathin films of Gd evaporated on an amorphous Ge or Sb layer. These films show a large negative MR accompanied by a hysteretic superimposed structure. When the film is coated by an overlayer of Ge or Sb the magnitude of the MR increases and the hysteretic structure disappears. We speculate that the findings are a result of a crossover from a two-dimensional (2D) magnetic disorder in the uncoated layers of Gd to a 3D magnetic disorder as the Gd film is coated by a semiconducting layer.

【 授权许可】

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