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Uniaxial magnetic anisotropy of quasi-one-dimensional Fe chains on Pb/Si: A Monte Carlo simulation
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Image of FIG. 1.
FIG. 1.

The STM images of Fe chains at (a) 1.3 ML and (b) 1.7 ML. (c) the schematic diagram of the model. (d) Schematic evolution of the growth of Fe island, the initial nucleation (yellow area), growth (blue area), and coalescence (gray area); (e) the 3D diagrammatic sketch of one Fe island.

Image of FIG. 2.
FIG. 2.

Comparison of the magnetometric tenor for two interacting islands located at a distance along direction between the FFT numerical approach and DIP. The red circle represents the dipolar approximated results, whereas the black block indicates the FFT results. The three diagonal elements are all compared. The nondiagonal elements of magnetometric tenor are nearly equal to zero.

Image of FIG. 3.
FIG. 3.

Left: the M-T curves for three samples at different coverage. Right: the ordering temperature as a function of coverage for four cases. Blue diamonds: FFT method with exchange interaction; Green diamonds: FFT method without exchange interaction; red circles: DIP method without exchange interaction; black blocks: DIP method with exchange interaction.

Image of FIG. 4.
FIG. 4.

[(a) and (b)] Representative calculated hysteresis loops for the system with coverage ML and 1.7 ML. [(c) and (d)] The corresponding SMOKE curves with the same external parameters.

Image of FIG. 5.
FIG. 5.

Time dependence of the magnetization with external parameters ( ML, , and ).


Generic image for table
Table I.

Summary of Fe islands parameters and magnetic states at different coverage.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Uniaxial magnetic anisotropy of quasi-one-dimensional Fe chains on Pb/Si: A Monte Carlo simulation