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. 2024 Aug 21;146(33):23616-23624.
doi: 10.1021/jacs.4c08684. Epub 2024 Aug 13.

Optical Readout of Single-Molecule Magnets Magnetic Memories with Unpolarized Light

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Optical Readout of Single-Molecule Magnets Magnetic Memories with Unpolarized Light

Maria Sara Raju et al. J Am Chem Soc. .

Abstract

Magnetic materials are widely used for many technologies in energy, health, transportation, computation, and data storage. For the latter, the readout of the magnetic state of a medium is crucial. Optical readout based on the magneto-optical Faraday effect was commercialized but soon abandoned because of the need for a complex circular polarization-sensitive readout. Combining chirality with magnetism can remove this obstacle, as chiral magnetic materials exhibit magneto-chiral dichroism, a differential absorption of unpolarized light dependent on their magnetic state. Molecular chemistry allows the rational introduction of chirality into single-molecule magnets (SMMs), ultimate nanoobjects capable of retaining magnetization. Here, we report the first experimental demonstration of optical detection of the magnetic state of an SMM using unpolarized light on a novel air-stable Dy-based chiral SMM featuring a strong single-ion magnetic anisotropy. These findings might represent a paradigm shift in the field of optical data readout technologies.

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