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The dream of using superconducting materials in power transmission systems has long captivated scientists. On the 10th, a report from the Hefei Institute of Materials Science, Chinese Academy of Sciences, revealed that researchers at the Strong Magnetic Field Science Center have made significant progress. Their experiments showed that a particular superconducting material can carry high currents, bringing humanity one step closer to realizing the vision of a superconducting power transmission system.
For decades, the application of superconductors in real-world power grids has faced major challenges. One of the key obstacles is finding superconducting materials that are both efficient and flexible enough for practical use. This has led to extensive research in fields such as condensed matter physics, materials science, and engineering, all aiming to develop materials with real-world potential.
Recently, under the leadership of Academician Zhang Yuheng, the team led by Zhang Changjin has achieved breakthroughs in this area. They successfully synthesized Nb₂PdₓS₅₋ᵧ (0.6 ≤ x < 1) superconducting fibers using a high-temperature solid-state reaction method. These fibers, with diameters ranging from 0.3 to 3 micrometers, exhibit exceptional flexibility and remarkable stability in air, suggesting promising applications in future technologies.
Moreover, the team used the 16 Tesla physical property testing system at the Strong Magnetic Field Science Center to evaluate the superconducting properties of these fibers under intense magnetic fields. The results showed that both the upper critical magnetic field and critical current density increase as the sample diameter decreases. For instance, a fiber with a 1.5 μm diameter had an upper critical field of about 34 Tesla, while a 0.5 μm fiber exceeded 40 Tesla. These impressive values indicate that the material can carry large currents even in extreme magnetic environments.
This research was supported by the Ministry of Science and Technology, the National Natural Science Foundation of China, and the Chinese Academy of Sciences. The findings were recently published in the prestigious journal *ACS Nano*. (Reporter: Wu Lan)