Researchers Create a Magnet Made of One Molecule

Sometimes making a brand-new type of box requires outside-the-box thinking, which is exactly what Spartan chemists used to create an eight-atom, magnetic cube. Phys.Org reports: Part of what made the researchers' idea so wild was their choice to work with starting ingredients that are notoriously finicky in the chemistry community. One ingredient is a group of elements referred to as lanthanides, which occupy a special row toward the bottom of the periodic table of elements. The other is the metallic element bismuth, which doesn't typically get too much attention (although some may recognize it from its role in bright pink antacids such as Pepto Bismol). By finding a way to combine the bismuth with a lanthanide element -- notably terbium or dysprosium -- they created a molecule with permanent magnetic features. It's the same magnetism found in bar magnets and hard disk drives, but at a much smaller scale. The small scale of molecular magnets offers technological opportunities, such as improving the storage capacity of magnetic hard drives. There are also emerging applications where conventional magnets may simply be too large to contribute, such as in processors for quantum computers. The first single-molecule magnet was discovered about 30 years ago and, since then, researchers have been seeking new varieties with different physical and chemical attributes. They've also been working to develop more creative chemical approaches to make the magnets. The molecule itself, though, looks simple, belying the complexity of the process required to make it. The top and bottom of the molecule are capped with rings of carbon and hydrogen atoms. Each ring is linked to a lanthanide that forms a cube with the bismuth atoms. The researchers published their findings in the journal Chem.

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