Quantum-mechanical treatment of atomic resolution differential phase contrast imaging of magnetic materials

Abstract

Utilizing the Pauli equation based multislice method, introduced in Phys. Rev. Lett. 116, 127203 (2016), we study the atomic resolution differential phase contrast (DPC) imaging on an example of a hard magnet FePt with in-plane magnetization. Simulated center of mass pattern in a scanning transmission electron microscopy (STEM) experiment carries information about both electric and magnetic fields. The momentum transfer remains curl-free, which has consequences for interpretation of the integrated DPC technique. The extracted magnetic component of the pattern is compared to the expected projected microscopic magnetic field as obtained by density functional theory calculation. Qualitative agreement is obtained for low sample thicknesses and a suitable range of collection angles.

arXiv comment9 pages, 8 figures

References in corpus (3)

• Elastic scattering of electron vortex beams in magnetic matter
• Induction Mapping of the 3D-Modulated Spin Texture of Skyrmions in Thin Helimagnets
• Magnetic Effects in the Paraxial Regime of Elastic Electron Scattering

Cited by in corpus (7)

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• Magnon diffuse scattering in scanning transmission electron microscopy
• High-sensitivity mapping of magnetic induction fields with nanometer-scale resolution: comparison of off-axis electron holography and pixelated differential phase contrast
• Angstrom-Scale Imaging of Magnetization in Antiferromagnetic Fe${}_2$As via 4D-STEM
• Enabling atomic resolution in convergent beam EMCD measurements by the use of patterned apertures
• Spin Resonance Spectroscopy with an Electron Microscope
• Simulations of magnetic Bragg scattering in transmission electron microscopy