Chinese and Japanese researchers recently discovered the first manganese-based superconductor. The study was published in the journal Physical Review Letters.
Previously, some materials such as manganese phosphide have been considered impossible to have a superconducting state because electrons in common superconductors form pairs of moorings, and the magnetic properties of those materials destroy them. But later, researchers used magnetic suppression technology and found that the superconducting state of certain organic or iron-based materials was not driven by Cooper.
In this latest study, the researchers in turn subjected the material to a range of temperatures and different intensities of pressure, tested conditions that might allow the superconducting state of the material to be present, and made a phase diagram. They found that when the manganese phosphide sample was frozen at 1 kelvin (minus 272.15 degrees Celsius) and the pressure increased to 8 gigapascals, its magnetic properties were suppressed, and the resistivity suddenly dropped, resulting in a superconducting state. At the same time, because of the high proportion of volume fractions, the researchers were able to rule out the possibility that this performance would only stay in one place.
Manganese phosphide is a helical magnet, and the researchers pointed out that this suggests that other materials with magnetic spins that resemble a helix may also exist. (Reporter Li Wei)
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