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the reporter learned from the institute of physics of the chinese academy of sciences that our country’s scientific research team, together with multiple foreign research teams, has made important progress in the research of nickel-based high-temperature superconductors. researchers used the national "twelfth five-year plan" major scientific and technological infrastructure comprehensive extreme conditions experimental facility (secuf) to simultaneously provide high-pressure conditions in praseodymium (pr)-doped double nickel oxide layer perovskite material (la2prni2o7) polycrystalline samples. two key experimental evidences for achieving bulk high-temperature superconductivity, namely zero resistance and complete diamagnetism, clarify the current controversial issues about the origin of high-temperature superconductivity and bulk superconductivity in double nickel oxide layer perovskite materials (la3ni2o7). and revealed the adverse effects of microstructural disorder on high-temperature superconductivity. this work has an important guiding role in the further optimized design and synthesis of nickel-based high-temperature superconducting materials, and will promote the research process of nickel-based high-temperature superconductors. relevant scientific research results were published in the international academic journal "nature" on october 2, beijing time.

the comprehensive extreme conditions experimental facility (secuf) is located in the huairou comprehensive national science center in beijing. it is a major national science and technology infrastructure project during the 12th five-year plan built by the institute of physics, chinese academy of sciences and others. it is also the first major national science and technology infrastructure project to start construction in huairou science city. the facility will be fully put into trial operation in early 2023. at present, secuf has built an internationally advanced user experimental device that integrates comprehensive extreme conditions such as extremely low temperature, ultrahigh pressure, strong magnetic field and ultrafast light field, which can greatly enhance my country's basic research and application foundation in physical science and related fields. study comprehensive strength.

(cctv reporter shuai junquan and chu erjia)