Abstract Dmitry Budker, a professor of physics at the University of California, USA, and the University of Ben Gurion, Israel, recently published a study that found that synthetic diamond sensors can detect micro-magnetic fields in high-temperature superconductors. This discovery may solve the problem in science... .
Dmitry Budker, a professor of physics at the University of California, USA, and Ben Gurion University, Israel, recently published a study that found that synthetic diamond sensors can detect micro-magnetic fields in high-temperature superconductors. This discovery may solve many unresolved issues in science. technical challenge. The research results were published in the February Physical Review. Some physical properties and phenomena of high-temperature superconductors have been researched by some scientists in 1987 and won the Nobel Prize, but some of these technologies have not yet broken through; and the application of diamond sensor technology has greatly contributed to the bottleneck of these technologies. Understand and solve. Budker, a researcher at Lawrence Berkeley National Laboratory, said.
High-temperature superconductors are conductors that exhibit superconductivity when materials such as tantalum and niobium are cooled to 180 degrees Fahrenheit above absolute zero (-280°F); superconducting superconductors can achieve superconductivity by only a few degrees below absolute zero. . As early as 28 years ago, when scientists discovered high-temperature superconductors for the first time, they predicted that the future technology will soon realize the lossless electric transmission of room temperature superconductors and magnetic suspension trains. In the case of non-destructive electrical transmission, a superconducting cable made of superconducting material is used for power transmission, and the loss on the transmission line will be reduced to zero. In the case of maglev trains, trains equipped with superconducting magnets will have a speed of more than 500km•h. The realization of these advanced technologies requires the use of synthetic diamond sensors to achieve breakthrough research on high temperature superconducting materials.
“Diamond sensor technology will help us achieve a new leap in high-temperature superconductor technology and theory,†commented Ron and Folman of Ben Gurion University in the Negev.
The colors of diamonds are yellow, orange and purple, etc. These colors are produced from defects in the diamond carbon structure; some carbon atoms may be replaced by boron to absorb or emit a specific one of the beams. colour.
With the development and maturity of synthetic diamond technology, scientists have discovered that certain optical properties of diamond can be altered by implanting impurities. In the experiment, Ron and Folman used nitrogen atoms to “knock†the carbon atoms of the synthetic diamond, leaving some “holes†on the surface of the structure. These “holes†are those that are “knockedâ€. Lower vacancies; these vacancies are then heated to move around and pair with the nitrogen atoms to form a nitrogen vacancy center (NV center). For those negatively charged NV centers, when they emit light again, these rays are very sensitive to the magnetic field and can be read out by laser spectroscopy, which enables diamond sensor technology.
Folman also adds that the color center of diamonds exhibits unique quantum properties that are not available in other materials.
The sensing sensitivity and resolution characteristics of the diamond sensor are very superior. The operating temperature is much higher than that of the superconducting quantum interferometer (a magnetometer), and the work adaptability is stronger; thus it is more suitable for assisting scientists to study. High temperature superconductor. Budker said that the magnetic detection technology and equipment of superconducting materials are not available today. At the current level of technology, we need a device with superior performance and excellent performance like diamond sensor to achieve further breakthroughs in technology.
The team used diamond sensors to detect beryllium copper oxide (YBCO) superconductor sheets, one of the two most common and most common high temperature superconductor materials to date. The staff combined the diamond sensor and YBCO on a single chip and used it to detect the normal conduction to superconductivity. The staff found that the diamond sensor detected a fine eddy current during the change of conductivity. This eddy current appeared in the process of converting the material into a superconductor and disappeared from time to time. This discovery is crucial for understanding high temperature superconducting technology. .
Folman said: "Our experiments have proven that high-temperature superconductors can be detected by diamond sensors, then we will develop sensors with higher sensitivity and resolution to study individual eddy currents; hope to find some previous technologies through synthetic diamond sensors. New features not touched, new areas."
The research was sponsored and supported by the NATO Science Peace Program, the National Science Foundation, and the Institute of Basic Sciences at the University of California, Berkeley. (Compiled from 'Colored diamonds are a superconductor's best friend')
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