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Enhancement of magnetic properties in (Ga,Mn)N nanowires due to plasma treatment
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Image of FIG. 1.
FIG. 1.

(a) FESEM image of nitrogen-plasma-treated (Ga,Mn)N nanowires with random orientation. The high resolution lattice image is also shown in the inset. (b) EDX profile for a single (Ga,Mn)N nanowire. The change of atomic ratio with plasma treatment is also shown in the inset.

Image of FIG. 2.
FIG. 2.

Magnetization curves at for (Ga,Mn)N nanowires with nitrogen plasma treatment.

Image of FIG. 3.
FIG. 3.

SRPES spectra of O core level for as-grown GaN nanowires, as-grown (Ga,Mn)N nanowires, and nitrogen-plasma-treated (Ga,Mn)N nanowires.

Image of FIG. 4.
FIG. 4.

Fourier transforms of the functions weighted for Mn and Ga -edge EXAFS oscillations as a function of radius. Dotted lines show experimental data and solid lines are calculated spectra using FEFF 8.0.


Generic image for table
Table I.

Change of Ga, N, and Mn atomic concentrations with plasma treatment.

Generic image for table
Table II.

Parameters of local structure around Mn atoms obtained from best-fitting results of Mn -edge EXAFS. is the coordination number (Ref. 15). is the bond length, and is the Debye-Waller-like factor. The factor was defined as as . For the model calculations, a wurtzite structure with and and was used.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Enhancement of magnetic properties in (Ga,Mn)N nanowires due to N2 plasma treatment