Extended Depth of Field Magneto-Optical Kerr Microscopy for Applications in 3D Nanomagnetism
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866918285786742784 |
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| author | Zhao, Le Rabensteiner, Alexander Cascales-Sandoval, Miguel Ángel Leo, Naëmi Koraltan, Sabri Fernández-Pacheco, Amalio |
| author_facet | Zhao, Le Rabensteiner, Alexander Cascales-Sandoval, Miguel Ángel Leo, Naëmi Koraltan, Sabri Fernández-Pacheco, Amalio |
| contents | High-resolution imaging of magnetic nanostructures is essential for understanding fundamental spin phenomena and designing advanced devices. Recent developments in three-dimensional (3D) nanomagnetism have highlighted the growing need for imaging techniques that can capture magnetic structures across curved or tilted surfaces with high sensitivity. Though widely used as a powerful technique for imaging magnetization states, conventional magneto-optical Kerr effect (MOKE) microscopy faces inherent limitations in measuring non-planar systems due to its shallow depth of field (DOF). Here, we present an extended depth of field MOKE imaging approach, combining through-focus scanning with image-stitching-based reconstruction, to obtain sharp and well-resolved magnetic domain images across non-planar sample geometries. The method is validated on both perpendicularly and in-plane magnetized films tilted on purpose for this study, enabling quantitative analysis of domain morphology and detection sensitivity. This laboratory-accessible technique provides a fast and versatile route for 3D magnetic imaging, complementing large-scale X-ray-based methods and offering a practical tool for investigating non-planar magnetic samples with tilted or curved 3D geometries. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_08059 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Extended Depth of Field Magneto-Optical Kerr Microscopy for Applications in 3D Nanomagnetism Zhao, Le Rabensteiner, Alexander Cascales-Sandoval, Miguel Ángel Leo, Naëmi Koraltan, Sabri Fernández-Pacheco, Amalio Applied Physics High-resolution imaging of magnetic nanostructures is essential for understanding fundamental spin phenomena and designing advanced devices. Recent developments in three-dimensional (3D) nanomagnetism have highlighted the growing need for imaging techniques that can capture magnetic structures across curved or tilted surfaces with high sensitivity. Though widely used as a powerful technique for imaging magnetization states, conventional magneto-optical Kerr effect (MOKE) microscopy faces inherent limitations in measuring non-planar systems due to its shallow depth of field (DOF). Here, we present an extended depth of field MOKE imaging approach, combining through-focus scanning with image-stitching-based reconstruction, to obtain sharp and well-resolved magnetic domain images across non-planar sample geometries. The method is validated on both perpendicularly and in-plane magnetized films tilted on purpose for this study, enabling quantitative analysis of domain morphology and detection sensitivity. This laboratory-accessible technique provides a fast and versatile route for 3D magnetic imaging, complementing large-scale X-ray-based methods and offering a practical tool for investigating non-planar magnetic samples with tilted or curved 3D geometries. |
| title | Extended Depth of Field Magneto-Optical Kerr Microscopy for Applications in 3D Nanomagnetism |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2601.08059 |