Chemists from The University of Manchester and The Australian National University (ANU) have engineered a single-molecule magnet capable of storing information at frigid temperatures comparable to the dark side of the moon at night. This discovery, published in the prestigious journal Nature, could vastly enhance the future of data storage by enabling next-generation hardware compact enough to fit on a postage stamp, yet capable of storing 100 times more data than existing technologies.
Leading the research, Professor Nicholas Chilton from ANU’s Research School of Chemistry explained, “The new single-molecule magnet can retain its magnetic memory up to 100 Kelvin, which is about minus 173 degrees Celsius—akin to a moonlit evening.” This marks a significant improvement over the previous record of 80 Kelvin (minus 193 degrees Celsius), paving the way for potentially storing vast amounts of information in minuscule spaces.
The innovative molecule could redefine storage capabilities, potentially accommodating about three terabytes of data per square centimeter. Professor Chilton expressed the magnitude of this advancement by drawing an imaginative parallel, “Imagine squeezing 40,000 CD copies of Pink Floyd’s The Dark Side of the Moon into a hard drive no larger than a postage stamp, or around half a million TikTok videos.”
The demand for advanced data storage solutions is escalating as internet usage surges, with more people engaging in online activities like social media scrolling, video streaming, and cloud file storage. Magnetic materials have historically played a pivotal role in data storage, with current hard drives relying on magnetizing multiple atomic regions to store data. However, single-molecule magnets offer a revolutionary approach where information can be retained individually, dramatically increasing data density.
Professor David Mills from The University of Manchester noted the practical implications, “While still far from functioning in everyday environments like a standard freezer or room temperature, data storage at 100 Kelvin could become feasible for massive data centers used by tech giants like Google.” Importantly, the new magnet operates well above the temperature of liquid nitrogen, a common coolant, marking a step closer to practical applications.
The success of the new magnet lies in its unique atomic structure, featuring the rare earth element dysprosium positioned between two nitrogen atoms in a nearly linear configuration. This arrangement, stabilized with an alkene chemical group, had been theorized to enhance magnetic performance but was realized for the first time by the research team.
At ANU, a novel theoretical approach was developed to simulate the molecule’s magnetic behavior using quantum mechanics fundamentals. Professor Chilton highlighted, “Our simulations, powered by ANU’s National Computational Infrastructure and the Pawsey Supercomputing Research Centre, have elucidated why this molecule’s linear atomic arrangement results in superior magnetic memory performance.”
This breakthrough not only represents a significant leap in molecular magnet technology but also sets a blueprint for future innovations that could retain data at even higher temperatures.
