Room-temperature superconductivity has long been a feat pursued by the scientific community, and in recent days, Chinese scientists have made an exciting breakthrough when they observed the Meissner effect in the near-room temperature range in the laboratory. This discovery may have paved the way for room-temperature superconductivity.
The so-called Meissner effect refers to the phenomenon that in superconducting materials, when subjected to a magnetic field, a completely repulsive magnetic field will be formed inside the material. In the past, the Meissner effect was only observed at very low temperatures, but the results of this experiment show that the hysteresis loop also shows signs of the Meissner effect in the temperature range below 250 K.
这项研究的发表论文《Possible Meissner effect near room temperature in copper-substituted lead apatite》描述了科学家们使用铜替代铅磷灰石材料，观察到了迈斯纳效应的情况。
Although the South Korean team discovered the world's first room-temperature superconducting material last year, the findings of Chinese scientists have attracted widespread attention. A large number of Chinese scholars persist in conducting experiments in this field, hoping to promote the further development of the field of room-temperature superconductivity through reproduction and improvement.
In this study, the scientists conducted experiments using a video of suspended samples provided by Shinkawai and Shishiki and others. They found that the material exhibited diamagnetic DC magnetization at a magnetic field of 25 Oe, which is an important indication of room-temperature superconductivity.
However, there are some problems with this study. Scientists have found that there is a divergence between zero-field cooling and field-cooled measurements, which may be due to the asymmetry of the front and back scans of the magnetic field. Therefore, scientists need to further study and validate this result to determine whether room-temperature superconductivity is actually achieved.
In conclusion, Chinese scientists have made a new breakthrough in the field of room-temperature superconductivity, and they have observed the Meissner effect in the near-room temperature range. This discovery is expected to provide important clues for the realization of room-temperature superconductivity, but further research and verification are still needed. The efforts of Chinese scientists have brought new hope to this frontier field, and it is believed that room-temperature superconductivity will become a reality in the near future.