Case Analysis

For materials containing unpaired electrons (such as isolated single atom, conductor, magnetic molecule, transition metal ion, rare earth ion, ion cluster, doping material, defect material, biological free radical, metal protein, etc.), different spectral methods are used to analyze the structure of materials and their applications.

  • Nanoscale magnetic imaging

    In condensed matter physics, it is significant to determine the static spin distribution of magnetic materials, which is also the key to study new magnetic devices. QDAFM enables high-quality imaging of domain walls with ultra-high sensitivity at the nanoscale.(Nature Communications 6, 6733(2015).)

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  • Topological magnetic structure characterization

    Magnetic skyrmions are small swirling topological defects in the magnetization texture. It exhibits rich novel physical properties and provides a new platform for studying topological spintronics. The potential applications include high-density, low-power cost and nonvolatile storage devices. However, the detection of a single skyrmion at room temperature is still challenging. Owing to the high sensitivity and high spatial resolution features, QDAFM demonstrated its ability to solve this long-standing problem by reconstructing the full set of spin textures from a measured stray field. (Nature Communications 9, 2712 (2018).)

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  • Superconductor vortex imaging

    Microscopic studies of superconductors and their vortices play a vital role in understanding the mechanisms underlying superconductivity. QDAFM working at cryogenic conditions demonstrated its quantitative measuring and imaging ability for superconductor vortices, and this technique can be easily applied to other cryogenic condensed matter systems.(Nature Nanotechnology 11,677-681 (2016).)

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  • Free radical chemistry

    In chemistry, a radical is an atom, molecule, or ion that has an unpaired valence electron. Electron paramagnetic resonance (EPR) is the only technique that can detect free radicals directly. EPR is a versatile, non-destructive analytical technique that can detect unpaired electrons in solids, liquids, gases, cell suspensions, and in vivo.

    Related products: EPR100


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