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arXiv · 2101.10331

Multi-Angle Reconstruction of Domain Morphology with All-Optical Diamond Magnetometry

Lucio Stefan·Anthony K. C. Tan·Baptiste Vindolet·Michael Högen·Dickson Thian·Hang Khume Tan·Loïc Rondin·Helena S. Knowles·Jean-François Roch·Anjan Soumyanarayanan·Mete Atatüre
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Abstract

Scanning diamond magnetometers based on the optically detected magnetic resonance of the nitrogen-vacancy centre offer very high sensitivity and non-invasive imaging capabilities when the stray fields emanating from ultrathin magnetic materials are sufficiently low (< 10 mT). Beyond this low-field regime, the optical signal quenches and a quantitative measurement is challenging. While the field-dependent NV photoluminescence can still provide qualitative information on magnetic morphology, this operation regime remains unexplored particularly for surface magnetisation larger than $\sim$ 3 mA. Here, we introduce a multi-angle reconstruction technique (MARe) that captures the full nanoscale domain morphology in all magnetic-field regimes leading to NV photoluminescence quench. To demonstrate this, we use [Ir/Co/Pt]$_{14}$ multilayer films with surface magnetisation an order of magnitude larger than previous reports. Our approach brings non-invasive nanoscale magnetic field imaging capability to the study of a wider pool of magnetic materials and phenomena.

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Lucio Stefan, Anthony K. C. Tan, Baptiste Vindolet, Michael Högen, Dickson Thian, Hang Khume Tan, Loïc Rondin, Helena S. Knowles, Jean-François Roch, Anjan Soumyanarayanan, Mete Atatüre. 2021-01-25. Multi-Angle Reconstruction of Domain Morphology with All-Optical Diamond Magnetometry. https://doi.org/10.1103/physrevapplied.16.014054

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