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"We've opened up an enormous new realm," Weijers said. "I don't know what that limit is, but it's beyond 100 tesla. The required materials exist. It's just technology and dollars that are between us and 100 tesla."
phys.org - National MagLab's latest magnet snags world record, marks new era of scientific discovery
"Our task was to change the 1D structure in order to increase the temperature of superconductive transition" comments Anatoly Zatsepin, the head of a scientific research laboratory at Institute of Physics and Technology, UrFU. "It turned out that if you pile SWCNTs [single walled carbon nanotubes] up, Cooper pairs stabilize, and a superconductor is formed." Still, even such piles require quite low temperatures to exhibit superconductive properties - only 15 degrees above absolute zero.
Physicists found a solution for this issue as well. They added a one atom wide carbon "wire" inside SWCNTs. The chain itself does not form bonds with the atoms of the tube, but it makes the tube change its own geometry and flex.
When the team from UrFU changed the shape of the internal carbon chain from straight to zigzag-like, they managed to increase the temperature of superconductivity transition by 45 degrees. To achieve the best effect, the angles of zigzags were mathematically calculated, and the predictions proved to be correct.