Figure 2 | Scientific Reports

Figure 2

From: Reversed ageing of Fe3O4 nanoparticles by hydrogen plasma

Figure 2

Plasma efficiency checked by x-ray absorption spectroscopy.

X-ray absorption near-edge structure (a) and magnetic circular dichroism (b) at the Fe L3,2 absorption edges at room temperature for aged Fe3O4 nanoparticles (black line), Fe3O4 nanoparticles after incomplete hydrogen plasma treatment (blue line) and after a complete hydrogen plasma treatment (magenta line). Spectra were taken at T = 300 K in a magnetic field of 3 T.

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