Reconstruction of magnetization density in two-dimensional samples from soft X-ray speckle patterns using the...

Area of Science:

• Condensed Matter Physics
• Materials Science
• X-ray Optics

Background:

• Imaging magnetic domains is crucial for understanding magnetic phenomena in thin films and 2D materials.
• Existing techniques may have limitations in resolution or non-destructiveness.
• Soft X-ray scattering offers unique sensitivity to magnetic properties.

Purpose of the Study:

• To propose and demonstrate a novel non-destructive technique for imaging magnetic domains.
• To utilize coherent soft X-ray scattering combined with multiple-wavelength anomalous diffraction (MAD).
• To explore the influence of incident light polarization on imaging capabilities.

Main Methods:

• Employing coherent soft X-ray scattering with the MAD method.
• Exploiting the energy dependence of magnetic scattering near absorption edges (L(2,3) for 3d transition metals, M(4,5) for 4f elements).
• Deriving phase information from the interference between charge and magnetic scattering amplitudes.
• Utilizing magnetic speckle patterns for reconstruction of magnetic domain distribution.

Main Results:

• Successful demonstration of magnetic domain reconstruction in an artificial Fe thin film.
• Validation of the proposed algorithm using experimental magnetic speckle patterns.
• Investigation into the effects of circular and linear polarization on the imaging method's performance.

Conclusions:

• The proposed non-destructive X-ray scattering technique enables effective imaging of magnetic domains.
• The method is applicable to thin films and two-dimensional magnetic structures.
• Understanding polarization effects is key to optimizing magnetic domain imaging.