Three-dimensional tomographic imaging of the magnetization vector field using Fourier transform holography

Di Pietro Martínez, Marisel; Wartelle, Alexis; Herrero Martínez, Carlos; Fettar, Farid; Blondelle, Florent; Motte, Jean-François; Donnelly, Claire; Turnbull, Luke; Ogrin, Feodor; van der Laan, Gerrit; Popescu, Horia; Jaouen, Nicolas; Yakhou-Harris, Flora; Beutier, Guillaume

Abstract

In recent years, interest in expanding from 2D to 3D systems has grown in the magnetism community, from exploring new geometries to broadening the knowledge on the magnetic textures present in thick samples, and with this arises the need for new characterization techniques, in particular tomographic imaging. Here, we present a new tomographic technique based on Fourier transform holography, a lensless imaging technique that uses a known reference in the sample to retrieve the object of interest from its diffraction pattern in one single step of the calculation, overcoming the phase problem inherent to reciprocal-space-based techniques. Moreover, by exploiting the phase contrast instead of the absorption contrast, thicker samples can be investigated. We obtain a 3D full-vectorial image of a 800-nm-thick extended Fe/Gd multilayer in a 5 − µ m -diameter circular field of view with a resolution of approximately 80 nm. The 3D image reveals wormlike domains with magnetization pointing mostly out of plane near the surface of the sample but that falls in-plane near the substrate. Since the FTH setup is fairly simple, it allows modifying the sample environment. Therefore this technique could enable in particular a 3D view of the magnetic configuration's response to an external magnetic field.

Citation

Di Pietro Martínez, M., Wartelle, A., Herrero Martínez, C., Fettar, F., Blondelle, F., Motte, J.-F., Donnelly, C., Turnbull, L., Ogrin, F., van der Laan, G., Popescu, H., Jaouen, N., Yakhou-Harris, F., & Beutier, G. (2023). Three-dimensional tomographic imaging of the magnetization vector field using Fourier transform holography. Physical Review B, 107(9), Article 094425. https://doi.org/10.1103/physrevb.107.094425

• Journal Article Type: Article
• Acceptance Date: Feb 17, 2023
• Online Publication Date: Mar 22, 2023
• Publication Date: 2023
• Deposit Date: Jul 18, 2023
• Publicly Available Date: Jul 19, 2023
• Journal: Physical review B: Condensed matter and materials physics
• Print ISSN: 2469-9950
• Electronic ISSN: 2469-9969
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 107
• Issue: 9
• Article Number: 094425
• DOI: https://doi.org/10.1103/physrevb.107.094425
• Public URL: https://durham-repository.worktribe.com/output/1169398