Scientists have created the most thin magnet in the world, preserving properties even at high temperatures


The researchers created the first ultra-thin magnet, the thickness of only 1 atom, which opens the way to develop the memory devices and the new generation electronics.

In modern storage devices, magnetic components usually consist of very thin films. However, they still remain three-dimensional, since they have a thickness of 100-1000 atoms. Engineers have long been looking for a way to make truly two-dimensional magnetic films to increase the storage density.

Although previous scientists have already created 2D magnets, but they all worked well only at low temperatures, and in normal conditions quickly lost their properties or became chemically unstable. Now the team from the National Laboratory named after Lawrence Berkeley could produce a practical magnet with a thickness of 1 atom, preserving characteristics even at 100 ° C.

To create it, the researchers used a solution from graphene oxide, zinc and cobalt. After a few hours of baking in the laboratory furnace, this mixture turns into a monohydric layer of zinc oxide with a small amount of cobalt, shed between graphene sheets. At the second stage, graphene is burned, leaving only a cobalt oxide film doped.

The team confirmed the receipt of a truly two-dimensional structure using scanning electron microscopy, literally examining the material in atoms. To test magnetic properties at high temperatures, scientists used X-ray experiments.

In the course of the experiments, it was found that with a content of 5-6% of cobalt atoms, the film exhibits weak magnetic properties. An increase in concentration up to 12% leads to a very strong magnetic effect. With an increase in the cobalt content above 15%, the material passes into the exotic state of the quantum «frustration», in which the internal magnetic forces suppress each other.

According to the command, such a two-dimensional magnet allows you to create electronics and the next generation data stores, such as super-accumulating devices of spinton memory and new tools for studying quantum physics. The material production technology can be quite easily mastered on an industrial scale.

Recall that just a couple of months ago, scientists also opened

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