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Local and nonlocal magnetic behavior of dilute manganese-doped nickel alloys
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View: Figures


Image of FIG. 1.
FIG. 1.

Scanning electron microscope (SEM) image of sample taken at a 45º angle. The side profile and top layer show the islandlike growth of the metal deposited on silicon.

Image of FIG. 2.
FIG. 2.

Schematic showing a cross section of the experiment (not drawn to scale).

Image of FIG. 3.
FIG. 3.

MCD of of the and peaks of nickel. The Mn is ferromagnetically aligned to the nickel at small concentrations. At 5% of Mn in Ni, we note an enhanced dichroism signal on the nickel. At higher concentrations , this nickel signal decreases.

Image of FIG. 4.
FIG. 4.

Hysteresis loops measured by SQUID. Although the saturation magnetization decreases with increasing concentration of Mn (just like ), the coercive field (a) remains relatively constant at low concentrations dropping rapidly at . (b) shows a drastic change in hysteresis behavior approaching the spin-glass concentration .

Image of FIG. 5.
FIG. 5.

Curves showing the (a) saturation magnetization and (b) coercive field vs concentration. Note: the saturation magnetization and the coercivity both decline rapidly to zero at , then increase for higher concentrations. The line drawn through the data is a guide to the eye.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Local and nonlocal magnetic behavior of dilute manganese-doped nickel alloys